diff --git a/packages/in_app_purchase/in_app_purchase_android/android/src/main/java/io/flutter/plugins/inapppurchase/Messages.java b/packages/in_app_purchase/in_app_purchase_android/android/src/main/java/io/flutter/plugins/inapppurchase/Messages.java
index fa1135fed036..aba22ed2b3bc 100644
--- a/packages/in_app_purchase/in_app_purchase_android/android/src/main/java/io/flutter/plugins/inapppurchase/Messages.java
+++ b/packages/in_app_purchase/in_app_purchase_android/android/src/main/java/io/flutter/plugins/inapppurchase/Messages.java
@@ -95,6 +95,31 @@ public enum PlatformBillingResponse {
     }
   }
 
+  /** Response code for the in-app messaging API call. */
+  public enum PlatformInAppMessageResponse {
+    /**
+     * The flow has finished and there is no action needed from developers.
+     *
+     * <p>Note: The API callback won't indicate whether message is dismissed by the user or there is
+     * no message available to the user.
+     */
+    NO_ACTION_NEEDED(0),
+    /**
+     * The subscription status changed.
+     *
+     * <p>For example, a subscription has been rec- overed from a suspended state. Developers should
+     * expect the purchase token to be returned with this response code and use the purchase token
+     * with the Google Play Developer API.
+     */
+    SUBSCRIPTION_STATUS_UPDATED(1);
+
+    final int index;
+
+    PlatformInAppMessageResponse(final int index) {
+      this.index = index;
+    }
+  }
+
   public enum PlatformReplacementMode {
     UNKNOWN_REPLACEMENT_MODE(0),
     WITH_TIME_PRORATION(1),
@@ -1025,6 +1050,102 @@ ArrayList<Object> toList() {
     }
   }
 
+  /**
+   * Results related to in-app messaging.
+   *
+   * <p>Generated class from Pigeon that represents data sent in messages.
+   */
+  public static final class PlatformInAppMessageResult {
+    /** Returns response code for the in-app messaging API call. */
+    private @NonNull PlatformInAppMessageResponse responseCode;
+
+    public @NonNull PlatformInAppMessageResponse getResponseCode() {
+      return responseCode;
+    }
+
+    public void setResponseCode(@NonNull PlatformInAppMessageResponse setterArg) {
+      if (setterArg == null) {
+        throw new IllegalStateException("Nonnull field \"responseCode\" is null.");
+      }
+      this.responseCode = setterArg;
+    }
+
+    /** Returns token that identifies the purchase to be acknowledged, if any. */
+    private @Nullable String purchaseToken;
+
+    public @Nullable String getPurchaseToken() {
+      return purchaseToken;
+    }
+
+    public void setPurchaseToken(@Nullable String setterArg) {
+      this.purchaseToken = setterArg;
+    }
+
+    /** Constructor is non-public to enforce null safety; use Builder. */
+    PlatformInAppMessageResult() {}
+
+    @Override
+    public boolean equals(Object o) {
+      if (this == o) {
+        return true;
+      }
+      if (o == null || getClass() != o.getClass()) {
+        return false;
+      }
+      PlatformInAppMessageResult that = (PlatformInAppMessageResult) o;
+      return responseCode.equals(that.responseCode)
+          && Objects.equals(purchaseToken, that.purchaseToken);
+    }
+
+    @Override
+    public int hashCode() {
+      return Objects.hash(responseCode, purchaseToken);
+    }
+
+    public static final class Builder {
+
+      private @Nullable PlatformInAppMessageResponse responseCode;
+
+      @CanIgnoreReturnValue
+      public @NonNull Builder setResponseCode(@NonNull PlatformInAppMessageResponse setterArg) {
+        this.responseCode = setterArg;
+        return this;
+      }
+
+      private @Nullable String purchaseToken;
+
+      @CanIgnoreReturnValue
+      public @NonNull Builder setPurchaseToken(@Nullable String setterArg) {
+        this.purchaseToken = setterArg;
+        return this;
+      }
+
+      public @NonNull PlatformInAppMessageResult build() {
+        PlatformInAppMessageResult pigeonReturn = new PlatformInAppMessageResult();
+        pigeonReturn.setResponseCode(responseCode);
+        pigeonReturn.setPurchaseToken(purchaseToken);
+        return pigeonReturn;
+      }
+    }
+
+    @NonNull
+    ArrayList<Object> toList() {
+      ArrayList<Object> toListResult = new ArrayList<>(2);
+      toListResult.add(responseCode);
+      toListResult.add(purchaseToken);
+      return toListResult;
+    }
+
+    static @NonNull PlatformInAppMessageResult fromList(@NonNull ArrayList<Object> pigeonVar_list) {
+      PlatformInAppMessageResult pigeonResult = new PlatformInAppMessageResult();
+      Object responseCode = pigeonVar_list.get(0);
+      pigeonResult.setResponseCode((PlatformInAppMessageResponse) responseCode);
+      Object purchaseToken = pigeonVar_list.get(1);
+      pigeonResult.setPurchaseToken((String) purchaseToken);
+      return pigeonResult;
+    }
+  }
+
   /**
    * Pigeon version of BillingConfigWrapper, which contains the components of the Java
    * BillingConfigResponseListener callback.
@@ -3126,80 +3247,89 @@ protected Object readValueOfType(byte type, @NonNull ByteBuffer buffer) {
             Object value = readValue(buffer);
             return value == null
                 ? null
-                : PlatformReplacementMode.values()[((Long) value).intValue()];
+                : PlatformInAppMessageResponse.values()[((Long) value).intValue()];
           }
         case (byte) 131:
           {
             Object value = readValue(buffer);
-            return value == null ? null : PlatformProductType.values()[((Long) value).intValue()];
+            return value == null
+                ? null
+                : PlatformReplacementMode.values()[((Long) value).intValue()];
           }
         case (byte) 132:
+          {
+            Object value = readValue(buffer);
+            return value == null ? null : PlatformProductType.values()[((Long) value).intValue()];
+          }
+        case (byte) 133:
           {
             Object value = readValue(buffer);
             return value == null
                 ? null
                 : PlatformBillingChoiceMode.values()[((Long) value).intValue()];
           }
-        case (byte) 133:
+        case (byte) 134:
           {
             Object value = readValue(buffer);
             return value == null
                 ? null
                 : PlatformBillingClientFeature.values()[((Long) value).intValue()];
           }
-        case (byte) 134:
+        case (byte) 135:
           {
             Object value = readValue(buffer);
             return value == null ? null : PlatformPurchaseState.values()[((Long) value).intValue()];
           }
-        case (byte) 135:
+        case (byte) 136:
           {
             Object value = readValue(buffer);
             return value == null
                 ? null
                 : PlatformRecurrenceMode.values()[((Long) value).intValue()];
           }
-        case (byte) 136:
-          return PlatformQueryProduct.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 137:
-          return PlatformAccountIdentifiers.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformQueryProduct.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 138:
-          return PlatformBillingResult.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformAccountIdentifiers.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 139:
+          return PlatformBillingResult.fromList((ArrayList<Object>) readValue(buffer));
+        case (byte) 140:
           return PlatformOneTimePurchaseOfferDetails.fromList(
               (ArrayList<Object>) readValue(buffer));
-        case (byte) 140:
-          return PlatformProductDetails.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 141:
-          return PlatformProductDetailsResponse.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformProductDetails.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 142:
+          return PlatformProductDetailsResponse.fromList((ArrayList<Object>) readValue(buffer));
+        case (byte) 143:
           return PlatformAlternativeBillingOnlyReportingDetailsResponse.fromList(
               (ArrayList<Object>) readValue(buffer));
-        case (byte) 143:
-          return PlatformBillingConfigResponse.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 144:
-          return PlatformBillingFlowParams.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformInAppMessageResult.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 145:
-          return PlatformPricingPhase.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformBillingConfigResponse.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 146:
-          return PlatformPurchase.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformBillingFlowParams.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 147:
-          return PlatformPendingPurchaseUpdate.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformPricingPhase.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 148:
-          return PlatformPurchaseHistoryRecord.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformPurchase.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 149:
-          return PlatformPurchaseHistoryResponse.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformPendingPurchaseUpdate.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 150:
-          return PlatformPurchasesResponse.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformPurchaseHistoryRecord.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 151:
-          return PlatformSubscriptionOfferDetails.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformPurchaseHistoryResponse.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 152:
-          return PlatformUserChoiceDetails.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformPurchasesResponse.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 153:
-          return PlatformUserChoiceProduct.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformSubscriptionOfferDetails.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 154:
-          return PlatformInstallmentPlanDetails.fromList((ArrayList<Object>) readValue(buffer));
+          return PlatformUserChoiceDetails.fromList((ArrayList<Object>) readValue(buffer));
         case (byte) 155:
+          return PlatformUserChoiceProduct.fromList((ArrayList<Object>) readValue(buffer));
+        case (byte) 156:
+          return PlatformInstallmentPlanDetails.fromList((ArrayList<Object>) readValue(buffer));
+        case (byte) 157:
           return PlatformPendingPurchasesParams.fromList((ArrayList<Object>) readValue(buffer));
         default:
           return super.readValueOfType(type, buffer);
@@ -3211,84 +3341,90 @@ protected void writeValue(@NonNull ByteArrayOutputStream stream, Object value) {
       if (value instanceof PlatformBillingResponse) {
         stream.write(129);
         writeValue(stream, value == null ? null : ((PlatformBillingResponse) value).index);
-      } else if (value instanceof PlatformReplacementMode) {
+      } else if (value instanceof PlatformInAppMessageResponse) {
         stream.write(130);
+        writeValue(stream, value == null ? null : ((PlatformInAppMessageResponse) value).index);
+      } else if (value instanceof PlatformReplacementMode) {
+        stream.write(131);
         writeValue(stream, value == null ? null : ((PlatformReplacementMode) value).index);
       } else if (value instanceof PlatformProductType) {
-        stream.write(131);
+        stream.write(132);
         writeValue(stream, value == null ? null : ((PlatformProductType) value).index);
       } else if (value instanceof PlatformBillingChoiceMode) {
-        stream.write(132);
+        stream.write(133);
         writeValue(stream, value == null ? null : ((PlatformBillingChoiceMode) value).index);
       } else if (value instanceof PlatformBillingClientFeature) {
-        stream.write(133);
+        stream.write(134);
         writeValue(stream, value == null ? null : ((PlatformBillingClientFeature) value).index);
       } else if (value instanceof PlatformPurchaseState) {
-        stream.write(134);
+        stream.write(135);
         writeValue(stream, value == null ? null : ((PlatformPurchaseState) value).index);
       } else if (value instanceof PlatformRecurrenceMode) {
-        stream.write(135);
+        stream.write(136);
         writeValue(stream, value == null ? null : ((PlatformRecurrenceMode) value).index);
       } else if (value instanceof PlatformQueryProduct) {
-        stream.write(136);
+        stream.write(137);
         writeValue(stream, ((PlatformQueryProduct) value).toList());
       } else if (value instanceof PlatformAccountIdentifiers) {
-        stream.write(137);
+        stream.write(138);
         writeValue(stream, ((PlatformAccountIdentifiers) value).toList());
       } else if (value instanceof PlatformBillingResult) {
-        stream.write(138);
+        stream.write(139);
         writeValue(stream, ((PlatformBillingResult) value).toList());
       } else if (value instanceof PlatformOneTimePurchaseOfferDetails) {
-        stream.write(139);
+        stream.write(140);
         writeValue(stream, ((PlatformOneTimePurchaseOfferDetails) value).toList());
       } else if (value instanceof PlatformProductDetails) {
-        stream.write(140);
+        stream.write(141);
         writeValue(stream, ((PlatformProductDetails) value).toList());
       } else if (value instanceof PlatformProductDetailsResponse) {
-        stream.write(141);
+        stream.write(142);
         writeValue(stream, ((PlatformProductDetailsResponse) value).toList());
       } else if (value instanceof PlatformAlternativeBillingOnlyReportingDetailsResponse) {
-        stream.write(142);
+        stream.write(143);
         writeValue(
             stream, ((PlatformAlternativeBillingOnlyReportingDetailsResponse) value).toList());
+      } else if (value instanceof PlatformInAppMessageResult) {
+        stream.write(144);
+        writeValue(stream, ((PlatformInAppMessageResult) value).toList());
       } else if (value instanceof PlatformBillingConfigResponse) {
-        stream.write(143);
+        stream.write(145);
         writeValue(stream, ((PlatformBillingConfigResponse) value).toList());
       } else if (value instanceof PlatformBillingFlowParams) {
-        stream.write(144);
+        stream.write(146);
         writeValue(stream, ((PlatformBillingFlowParams) value).toList());
       } else if (value instanceof PlatformPricingPhase) {
-        stream.write(145);
+        stream.write(147);
         writeValue(stream, ((PlatformPricingPhase) value).toList());
       } else if (value instanceof PlatformPurchase) {
-        stream.write(146);
+        stream.write(148);
         writeValue(stream, ((PlatformPurchase) value).toList());
       } else if (value instanceof PlatformPendingPurchaseUpdate) {
-        stream.write(147);
+        stream.write(149);
         writeValue(stream, ((PlatformPendingPurchaseUpdate) value).toList());
       } else if (value instanceof PlatformPurchaseHistoryRecord) {
-        stream.write(148);
+        stream.write(150);
         writeValue(stream, ((PlatformPurchaseHistoryRecord) value).toList());
       } else if (value instanceof PlatformPurchaseHistoryResponse) {
-        stream.write(149);
+        stream.write(151);
         writeValue(stream, ((PlatformPurchaseHistoryResponse) value).toList());
       } else if (value instanceof PlatformPurchasesResponse) {
-        stream.write(150);
+        stream.write(152);
         writeValue(stream, ((PlatformPurchasesResponse) value).toList());
       } else if (value instanceof PlatformSubscriptionOfferDetails) {
-        stream.write(151);
+        stream.write(153);
         writeValue(stream, ((PlatformSubscriptionOfferDetails) value).toList());
       } else if (value instanceof PlatformUserChoiceDetails) {
-        stream.write(152);
+        stream.write(154);
         writeValue(stream, ((PlatformUserChoiceDetails) value).toList());
       } else if (value instanceof PlatformUserChoiceProduct) {
-        stream.write(153);
+        stream.write(155);
         writeValue(stream, ((PlatformUserChoiceProduct) value).toList());
       } else if (value instanceof PlatformInstallmentPlanDetails) {
-        stream.write(154);
+        stream.write(156);
         writeValue(stream, ((PlatformInstallmentPlanDetails) value).toList());
       } else if (value instanceof PlatformPendingPurchasesParams) {
-        stream.write(155);
+        stream.write(157);
         writeValue(stream, ((PlatformPendingPurchasesParams) value).toList());
       } else {
         super.writeValue(stream, value);
@@ -3380,6 +3516,8 @@ void queryProductDetailsAsync(
      */
     void createAlternativeBillingOnlyReportingDetailsAsync(
         @NonNull Result<PlatformAlternativeBillingOnlyReportingDetailsResponse> result);
+    /** Wraps BillingClient#showInAppMessages(). */
+    void showInAppMessages(@NonNull Result<PlatformInAppMessageResult> result);
 
     /** The codec used by InAppPurchaseApi. */
     static @NonNull MessageCodec<Object> getCodec() {
@@ -3811,6 +3949,36 @@ public void error(Throwable error) {
           channel.setMessageHandler(null);
         }
       }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(
+                binaryMessenger,
+                "dev.flutter.pigeon.in_app_purchase_android.InAppPurchaseApi.showInAppMessages"
+                    + messageChannelSuffix,
+                getCodec());
+        if (api != null) {
+          channel.setMessageHandler(
+              (message, reply) -> {
+                ArrayList<Object> wrapped = new ArrayList<>();
+                Result<PlatformInAppMessageResult> resultCallback =
+                    new Result<PlatformInAppMessageResult>() {
+                      public void success(PlatformInAppMessageResult result) {
+                        wrapped.add(0, result);
+                        reply.reply(wrapped);
+                      }
+
+                      public void error(Throwable error) {
+                        ArrayList<Object> wrappedError = wrapError(error);
+                        reply.reply(wrappedError);
+                      }
+                    };
+
+                api.showInAppMessages(resultCallback);
+              });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
     }
   }
   /** Generated class from Pigeon that represents Flutter messages that can be called from Java. */
diff --git a/packages/in_app_purchase/in_app_purchase_android/android/src/main/java/io/flutter/plugins/inapppurchase/MethodCallHandlerImpl.java b/packages/in_app_purchase/in_app_purchase_android/android/src/main/java/io/flutter/plugins/inapppurchase/MethodCallHandlerImpl.java
index d496fb57b323..262b9a85259f 100644
--- a/packages/in_app_purchase/in_app_purchase_android/android/src/main/java/io/flutter/plugins/inapppurchase/MethodCallHandlerImpl.java
+++ b/packages/in_app_purchase/in_app_purchase_android/android/src/main/java/io/flutter/plugins/inapppurchase/MethodCallHandlerImpl.java
@@ -7,6 +7,7 @@
 import static io.flutter.plugins.inapppurchase.Translator.fromAlternativeBillingOnlyReportingDetails;
 import static io.flutter.plugins.inapppurchase.Translator.fromBillingConfig;
 import static io.flutter.plugins.inapppurchase.Translator.fromBillingResult;
+import static io.flutter.plugins.inapppurchase.Translator.fromInAppMessageResult;
 import static io.flutter.plugins.inapppurchase.Translator.fromProductDetailsList;
 import static io.flutter.plugins.inapppurchase.Translator.fromPurchaseHistoryRecordList;
 import static io.flutter.plugins.inapppurchase.Translator.fromPurchasesList;
@@ -31,6 +32,7 @@
 import com.android.billingclient.api.ConsumeParams;
 import com.android.billingclient.api.ConsumeResponseListener;
 import com.android.billingclient.api.GetBillingConfigParams;
+import com.android.billingclient.api.InAppMessageParams;
 import com.android.billingclient.api.ProductDetails;
 import com.android.billingclient.api.QueryProductDetailsParams;
 import com.android.billingclient.api.QueryPurchaseHistoryParams;
@@ -176,6 +178,29 @@ public void isAlternativeBillingOnlyAvailableAsync(
     }
   }
 
+  @Override
+  public void showInAppMessages(@NonNull Result<Messages.PlatformInAppMessageResult> result) {
+    if (billingClient == null) {
+      result.error(getNullBillingClientError());
+      return;
+    }
+    if (activity == null) {
+      result.error(new FlutterError(ACTIVITY_UNAVAILABLE, "Not attempting to show dialog", null));
+      return;
+    }
+    try {
+      InAppMessageParams params =
+          InAppMessageParams.newBuilder()
+              .addInAppMessageCategoryToShow(
+                  InAppMessageParams.InAppMessageCategoryId.TRANSACTIONAL)
+              .build();
+      billingClient.showInAppMessages(
+          activity, params, billingResult -> result.success(fromInAppMessageResult(billingResult)));
+    } catch (RuntimeException e) {
+      result.error(new FlutterError("error", e.getMessage(), Log.getStackTraceString(e)));
+    }
+  }
+
   @Override
   public void getBillingConfigAsync(
       @NonNull Result<Messages.PlatformBillingConfigResponse> result) {
diff --git a/packages/in_app_purchase/in_app_purchase_android/android/src/main/java/io/flutter/plugins/inapppurchase/Translator.java b/packages/in_app_purchase/in_app_purchase_android/android/src/main/java/io/flutter/plugins/inapppurchase/Translator.java
index a982964764dc..1bfb9c64996d 100644
--- a/packages/in_app_purchase/in_app_purchase_android/android/src/main/java/io/flutter/plugins/inapppurchase/Translator.java
+++ b/packages/in_app_purchase/in_app_purchase_android/android/src/main/java/io/flutter/plugins/inapppurchase/Translator.java
@@ -12,6 +12,7 @@
 import com.android.billingclient.api.BillingConfig;
 import com.android.billingclient.api.BillingFlowParams;
 import com.android.billingclient.api.BillingResult;
+import com.android.billingclient.api.InAppMessageResult;
 import com.android.billingclient.api.PendingPurchasesParams;
 import com.android.billingclient.api.ProductDetails;
 import com.android.billingclient.api.Purchase;
@@ -25,6 +26,8 @@
 import io.flutter.plugins.inapppurchase.Messages.PlatformBillingConfigResponse;
 import io.flutter.plugins.inapppurchase.Messages.PlatformBillingResponse;
 import io.flutter.plugins.inapppurchase.Messages.PlatformBillingResult;
+import io.flutter.plugins.inapppurchase.Messages.PlatformInAppMessageResponse;
+import io.flutter.plugins.inapppurchase.Messages.PlatformInAppMessageResult;
 import io.flutter.plugins.inapppurchase.Messages.PlatformOneTimePurchaseOfferDetails;
 import io.flutter.plugins.inapppurchase.Messages.PlatformPendingPurchaseUpdate;
 import io.flutter.plugins.inapppurchase.Messages.PlatformPricingPhase;
@@ -298,6 +301,25 @@ static PlatformPurchaseState toPlatformPurchaseState(int state) {
     return serialized;
   }
 
+  static @NonNull PlatformInAppMessageResult fromInAppMessageResult(
+      @NonNull InAppMessageResult inAppMessageResult) {
+    return new PlatformInAppMessageResult.Builder()
+        .setResponseCode(fromInAppMessageResponseCode(inAppMessageResult.getResponseCode()))
+        .setPurchaseToken(inAppMessageResult.getPurchaseToken())
+        .build();
+  }
+
+  static @NonNull PlatformInAppMessageResponse fromInAppMessageResponseCode(
+      @InAppMessageResult.InAppMessageResponseCode int inAppMessageResponseCode) {
+    switch (inAppMessageResponseCode) {
+      case InAppMessageResult.InAppMessageResponseCode.SUBSCRIPTION_STATUS_UPDATED:
+        return PlatformInAppMessageResponse.SUBSCRIPTION_STATUS_UPDATED;
+      case InAppMessageResult.InAppMessageResponseCode.NO_ACTION_NEEDED:
+        return PlatformInAppMessageResponse.NO_ACTION_NEEDED;
+    }
+    return PlatformInAppMessageResponse.NO_ACTION_NEEDED;
+  }
+
   static @NonNull PlatformBillingResult fromBillingResult(@NonNull BillingResult billingResult) {
     return new PlatformBillingResult.Builder()
         .setResponseCode(fromBillingResponseCode(billingResult.getResponseCode()))
diff --git a/packages/in_app_purchase/in_app_purchase_android/android/src/test/java/io/flutter/plugins/inapppurchase/MethodCallHandlerTest.java b/packages/in_app_purchase/in_app_purchase_android/android/src/test/java/io/flutter/plugins/inapppurchase/MethodCallHandlerTest.java
index d4cfeda77d0d..723c655d85aa 100644
--- a/packages/in_app_purchase/in_app_purchase_android/android/src/test/java/io/flutter/plugins/inapppurchase/MethodCallHandlerTest.java
+++ b/packages/in_app_purchase/in_app_purchase_android/android/src/test/java/io/flutter/plugins/inapppurchase/MethodCallHandlerTest.java
@@ -7,6 +7,7 @@
 import static io.flutter.plugins.inapppurchase.MethodCallHandlerImpl.ACTIVITY_UNAVAILABLE;
 import static io.flutter.plugins.inapppurchase.MethodCallHandlerImpl.REPLACEMENT_MODE_UNKNOWN_SUBSCRIPTION_UPGRADE_DOWNGRADE_POLICY;
 import static io.flutter.plugins.inapppurchase.Translator.fromBillingResponseCode;
+import static io.flutter.plugins.inapppurchase.Translator.fromInAppMessageResponseCode;
 import static java.util.Arrays.asList;
 import static java.util.Collections.singletonList;
 import static java.util.Collections.unmodifiableList;
@@ -45,6 +46,8 @@
 import com.android.billingclient.api.ConsumeParams;
 import com.android.billingclient.api.ConsumeResponseListener;
 import com.android.billingclient.api.GetBillingConfigParams;
+import com.android.billingclient.api.InAppMessageResponseListener;
+import com.android.billingclient.api.InAppMessageResult;
 import com.android.billingclient.api.ProductDetails;
 import com.android.billingclient.api.ProductDetailsResponseListener;
 import com.android.billingclient.api.Purchase;
@@ -63,6 +66,7 @@
 import io.flutter.plugins.inapppurchase.Messages.PlatformBillingConfigResponse;
 import io.flutter.plugins.inapppurchase.Messages.PlatformBillingFlowParams;
 import io.flutter.plugins.inapppurchase.Messages.PlatformBillingResult;
+import io.flutter.plugins.inapppurchase.Messages.PlatformInAppMessageResult;
 import io.flutter.plugins.inapppurchase.Messages.PlatformProductDetailsResponse;
 import io.flutter.plugins.inapppurchase.Messages.PlatformProductType;
 import io.flutter.plugins.inapppurchase.Messages.PlatformPurchaseHistoryResponse;
@@ -96,6 +100,7 @@ public class MethodCallHandlerTest {
   Messages.Result<Messages.PlatformAlternativeBillingOnlyReportingDetailsResponse>
       platformAlternativeBillingOnlyReportingDetailsResult;
 
+  @Spy Messages.Result<Messages.PlatformInAppMessageResult> platformInAppMessageResult;
   @Spy Messages.Result<Messages.PlatformBillingConfigResponse> platformBillingConfigResult;
   @Spy Messages.Result<PlatformBillingResult> platformBillingResult;
   @Spy Messages.Result<PlatformProductDetailsResponse> platformProductDetailsResult;
@@ -527,6 +532,62 @@ public void showAlternativeBillingOnlyInformationDialog_NullActivity() {
             .contains("Not attempting to show dialog"));
   }
 
+  @Test
+  public void showInAppMessagesSuccess() {
+    mockStartConnection();
+    ArgumentCaptor<InAppMessageResponseListener> listenerCaptor =
+        ArgumentCaptor.forClass(InAppMessageResponseListener.class);
+    BillingResult billingResult = buildBillingResult(BillingClient.BillingResponseCode.OK);
+    InAppMessageResult inAppMessageResult =
+        buildInAppMessageResult(
+            InAppMessageResult.InAppMessageResponseCode.SUBSCRIPTION_STATUS_UPDATED);
+
+    when(mockBillingClient.showInAppMessages(eq(activity), any(), listenerCaptor.capture()))
+        .thenReturn(billingResult);
+
+    methodChannelHandler.showInAppMessages(platformInAppMessageResult);
+    listenerCaptor.getValue().onInAppMessageResponse(inAppMessageResult);
+
+    ArgumentCaptor<PlatformInAppMessageResult> resultCaptor =
+        ArgumentCaptor.forClass(PlatformInAppMessageResult.class);
+    verify(platformInAppMessageResult, times(1)).success(resultCaptor.capture());
+    assertEquals(
+        resultCaptor.getValue().getResponseCode(),
+        fromInAppMessageResponseCode(inAppMessageResult.getResponseCode()));
+    assertEquals(resultCaptor.getValue().getPurchaseToken(), inAppMessageResult.getPurchaseToken());
+    verify(platformInAppMessageResult, never()).error(any());
+  }
+
+  @Test
+  public void showInAppMessages_serviceDisconnected() {
+    methodChannelHandler.showInAppMessages(platformInAppMessageResult);
+
+    // Assert that the async call returns an error result.
+    verify(platformInAppMessageResult, never()).success(any());
+    ArgumentCaptor<FlutterError> errorCaptor = ArgumentCaptor.forClass(FlutterError.class);
+    verify(platformInAppMessageResult, times(1)).error(errorCaptor.capture());
+    assertEquals("UNAVAILABLE", errorCaptor.getValue().code);
+    assertTrue(
+        Objects.requireNonNull(errorCaptor.getValue().getMessage()).contains("BillingClient"));
+  }
+
+  @Test
+  public void showInAppMessages_NullActivity() {
+    mockStartConnection();
+    methodChannelHandler.setActivity(null);
+
+    methodChannelHandler.showInAppMessages(platformInAppMessageResult);
+
+    // Assert that the async call returns an error result.
+    verify(platformInAppMessageResult, never()).success(any());
+    ArgumentCaptor<FlutterError> errorCaptor = ArgumentCaptor.forClass(FlutterError.class);
+    verify(platformInAppMessageResult, times(1)).error(errorCaptor.capture());
+    assertEquals(ACTIVITY_UNAVAILABLE, errorCaptor.getValue().code);
+    assertTrue(
+        Objects.requireNonNull(errorCaptor.getValue().getMessage())
+            .contains("Not attempting to show dialog"));
+  }
+
   @Test
   public void endConnection() {
     // Set up a connected BillingClient instance
@@ -1252,6 +1313,10 @@ private BillingResult buildBillingResult(int responseCode) {
         .build();
   }
 
+  private InAppMessageResult buildInAppMessageResult(int responseCode) {
+    return new InAppMessageResult(responseCode, "dummy purchase token");
+  }
+
   private void assertResultsMatch(PlatformBillingResult pigeonResult, BillingResult nativeResult) {
     assertEquals(
         pigeonResult.getResponseCode(), fromBillingResponseCode(nativeResult.getResponseCode()));
diff --git a/packages/in_app_purchase/in_app_purchase_android/example/lib/main.dart b/packages/in_app_purchase/in_app_purchase_android/example/lib/main.dart
index 6bb520121d19..bbc860589ce6 100644
--- a/packages/in_app_purchase/in_app_purchase_android/example/lib/main.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/example/lib/main.dart
@@ -53,6 +53,7 @@ class _MyAppState extends State<_MyApp> {
   String _isAlternativeBillingOnlyAvailableResponseCode = '';
   String _showAlternativeBillingOnlyDialogResponseCode = '';
   String _alternativeBillingOnlyReportingDetailsToken = '';
+  String _showInAppMessagesResponseCode = '';
   bool _isAvailable = false;
   bool _purchasePending = false;
   bool _loading = true;
@@ -274,6 +275,15 @@ class _MyAppState extends State<_MyApp> {
         subtitle: Text(_alternativeBillingOnlyReportingDetailsToken),
       ),
     );
+    entries.add(
+      ListTile(
+        title: Text(
+          'showInAppMessages response code',
+          style: TextStyle(color: ThemeData.light().colorScheme.primary),
+        ),
+        subtitle: Text(_showInAppMessagesResponseCode),
+      ),
+    );
 
     final List<Widget> buttons = <ListTile>[];
     buttons.add(
@@ -374,6 +384,25 @@ class _MyAppState extends State<_MyApp> {
         ),
       ),
     );
+    buttons.add(
+      ListTile(
+        title: TextButton(
+          style: TextButton.styleFrom(
+            backgroundColor: Colors.green[800],
+            foregroundColor: Colors.white,
+          ),
+          onPressed: () {
+            final addition =
+                InAppPurchasePlatformAddition.instance!
+                    as InAppPurchaseAndroidPlatformAddition;
+            unawaited(
+              deliverShowInAppMessagesResult(addition.showInAppMessages()),
+            );
+          },
+          child: const Text('showInAppMessages'),
+        ),
+      ),
+    );
     return Card(
       child: Column(
         children: <Widget>[
@@ -597,6 +626,15 @@ class _MyAppState extends State<_MyApp> {
     });
   }
 
+  Future<void> deliverShowInAppMessagesResult(
+    Future<InAppMessageResultWrapper> inAppMessageResult,
+  ) async {
+    final InAppMessageResultWrapper wrapper = await inAppMessageResult;
+    setState(() {
+      _showInAppMessagesResponseCode = wrapper.responseCode.name;
+    });
+  }
+
   Future<void> deliverProduct(PurchaseDetails purchaseDetails) async {
     // IMPORTANT!! Always verify purchase details before delivering the product.
     if (purchaseDetails.productID == _kConsumableId) {
diff --git a/packages/in_app_purchase/in_app_purchase_android/lib/billing_client_wrappers.dart b/packages/in_app_purchase/in_app_purchase_android/lib/billing_client_wrappers.dart
index 2224a4e8a543..8d5fda1661b5 100644
--- a/packages/in_app_purchase/in_app_purchase_android/lib/billing_client_wrappers.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/lib/billing_client_wrappers.dart
@@ -6,6 +6,7 @@ export 'src/billing_client_wrappers/alternative_billing_only_reporting_details_w
 export 'src/billing_client_wrappers/billing_client_manager.dart';
 export 'src/billing_client_wrappers/billing_client_wrapper.dart';
 export 'src/billing_client_wrappers/billing_response_wrapper.dart';
+export 'src/billing_client_wrappers/in_app_message_wrapper.dart';
 export 'src/billing_client_wrappers/one_time_purchase_offer_details_wrapper.dart';
 export 'src/billing_client_wrappers/product_details_wrapper.dart';
 export 'src/billing_client_wrappers/product_wrapper.dart';
diff --git a/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/billing_client_wrapper.dart b/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/billing_client_wrapper.dart
index b3df0cf619b9..0924054c0c32 100644
--- a/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/billing_client_wrapper.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/billing_client_wrapper.dart
@@ -10,6 +10,7 @@ import '../../billing_client_wrappers.dart';
 import '../messages.g.dart';
 import '../pigeon_converters.dart';
 import 'billing_config_wrapper.dart';
+import 'in_app_message_wrapper.dart';
 import 'pending_purchases_params_wrapper.dart';
 
 /// Callback triggered by Play in response to purchase activity.
@@ -347,6 +348,16 @@ class BillingClient {
       await _hostApi.createAlternativeBillingOnlyReportingDetailsAsync(),
     );
   }
+
+  /// Overlays billing related messages on top of the calling app.
+  //
+  // For example, show a message to inform users that their subscription payment
+  // has been declined and provide options to take them to fix their payment method.
+  Future<InAppMessageResultWrapper> showInAppMessages() async {
+    return inAppMessageResultWrapperFromPlatform(
+      await _hostApi.showInAppMessages(),
+    );
+  }
 }
 
 /// Implementation of InAppPurchaseCallbackApi, for use by [BillingClient].
diff --git a/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/in_app_message_wrapper.dart b/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/in_app_message_wrapper.dart
new file mode 100644
index 000000000000..c694a322fc42
--- /dev/null
+++ b/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/in_app_message_wrapper.dart
@@ -0,0 +1,47 @@
+import 'package:flutter/foundation.dart';
+
+/// Response code for the in-app messaging API call.
+enum InAppMessageResponse {
+  /// The flow has finished and there is no action needed from developers.
+  ///
+  /// Note: The API callback won't indicate whether message is dismissed by the
+  /// user or there is no message available to the user.
+  noActionNeeded,
+
+  /// The subscription status changed.
+  ///
+  /// For example, a subscription has been rec-
+  /// overed from a suspended state. Developers should expect the purchase token
+  /// to be returned with this response code and use the purchase token with the
+  /// Google Play Developer API.
+  subscriptionStatusUpdated,
+}
+
+/// Results related to in-app messaging.
+///
+/// Wraps [`com.android.billingclient.api.InAppMessageResult`](https://developer.android.com/reference/com/android/billingclient/api/InAppMessageResult).
+@immutable
+class InAppMessageResultWrapper {
+  /// Creates a [InAppMessageResultWrapper]
+  const InAppMessageResultWrapper({
+    required this.responseCode,
+    this.purchaseToken,
+  });
+
+  /// Returns response code for the in-app messaging API call.
+  final InAppMessageResponse responseCode;
+
+  /// Returns token that identifies the purchase to be acknowledged, if any.
+  final String? purchaseToken;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is InAppMessageResultWrapper &&
+          runtimeType == other.runtimeType &&
+          responseCode == other.responseCode &&
+          purchaseToken == other.purchaseToken;
+
+  @override
+  int get hashCode => Object.hash(responseCode, purchaseToken);
+}
diff --git a/packages/in_app_purchase/in_app_purchase_android/lib/src/in_app_purchase_android_platform_addition.dart b/packages/in_app_purchase/in_app_purchase_android/lib/src/in_app_purchase_android_platform_addition.dart
index e4d27cdb99bc..5dd2e3f9aa35 100644
--- a/packages/in_app_purchase/in_app_purchase_android/lib/src/in_app_purchase_android_platform_addition.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/lib/src/in_app_purchase_android_platform_addition.dart
@@ -198,6 +198,19 @@ class InAppPurchaseAndroidPlatformAddition
     return wrapper;
   }
 
+  /// Overlays billing related messages on top of the calling app.
+  ///
+  /// For example, show a message to inform users that their subscription payment
+  /// has been declined and provide options to take them to fix their payment method.
+  /// See: https://developer.android.com/reference/com/android/billingclient/api/BillingClient#showInAppMessages(android.app.Activity,com.android.billingclient.api.InAppMessageParams,com.android.billingclient.api.InAppMessageResponseListener)
+  Future<InAppMessageResultWrapper> showInAppMessages() async {
+    final InAppMessageResultWrapper wrapper = await _billingClientManager
+        .runWithClientNonRetryable(
+          (BillingClient client) => client.showInAppMessages(),
+        );
+    return wrapper;
+  }
+
   /// Disconnects, sets AlternativeBillingOnly to true, and reconnects to
   /// the [BillingClient].
   ///
diff --git a/packages/in_app_purchase/in_app_purchase_android/lib/src/messages.g.dart b/packages/in_app_purchase/in_app_purchase_android/lib/src/messages.g.dart
index cbcdb28231df..dba8c866b9dc 100644
--- a/packages/in_app_purchase/in_app_purchase_android/lib/src/messages.g.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/lib/src/messages.g.dart
@@ -67,6 +67,23 @@ enum PlatformBillingResponse {
   networkError,
 }
 
+/// Response code for the in-app messaging API call.
+enum PlatformInAppMessageResponse {
+  /// The flow has finished and there is no action needed from developers.
+  ///
+  /// Note: The API callback won't indicate whether message is dismissed by the
+  /// user or there is no message available to the user.
+  noActionNeeded,
+
+  /// The subscription status changed.
+  ///
+  /// For example, a subscription has been rec-
+  /// overed from a suspended state. Developers should expect the purchase token
+  /// to be returned with this response code and use the purchase token with the
+  /// Google Play Developer API.
+  subscriptionStatusUpdated,
+}
+
 enum PlatformReplacementMode {
   unknownReplacementMode,
   withTimeProration,
@@ -460,6 +477,50 @@ class PlatformAlternativeBillingOnlyReportingDetailsResponse {
   int get hashCode => Object.hashAll(_toList());
 }
 
+/// Results related to in-app messaging.
+class PlatformInAppMessageResult {
+  PlatformInAppMessageResult({required this.responseCode, this.purchaseToken});
+
+  /// Returns response code for the in-app messaging API call.
+  PlatformInAppMessageResponse responseCode;
+
+  /// Returns token that identifies the purchase to be acknowledged, if any.
+  String? purchaseToken;
+
+  List<Object?> _toList() {
+    return <Object?>[responseCode, purchaseToken];
+  }
+
+  Object encode() {
+    return _toList();
+  }
+
+  static PlatformInAppMessageResult decode(Object result) {
+    result as List<Object?>;
+    return PlatformInAppMessageResult(
+      responseCode: result[0]! as PlatformInAppMessageResponse,
+      purchaseToken: result[1] as String?,
+    );
+  }
+
+  @override
+  // ignore: avoid_equals_and_hash_code_on_mutable_classes
+  bool operator ==(Object other) {
+    if (other is! PlatformInAppMessageResult ||
+        other.runtimeType != runtimeType) {
+      return false;
+    }
+    if (identical(this, other)) {
+      return true;
+    }
+    return _deepEquals(encode(), other.encode());
+  }
+
+  @override
+  // ignore: avoid_equals_and_hash_code_on_mutable_classes
+  int get hashCode => Object.hashAll(_toList());
+}
+
 /// Pigeon version of BillingConfigWrapper, which contains the components of the
 /// Java BillingConfigResponseListener callback.
 class PlatformBillingConfigResponse {
@@ -1240,84 +1301,90 @@ class _PigeonCodec extends StandardMessageCodec {
     } else if (value is PlatformBillingResponse) {
       buffer.putUint8(129);
       writeValue(buffer, value.index);
-    } else if (value is PlatformReplacementMode) {
+    } else if (value is PlatformInAppMessageResponse) {
       buffer.putUint8(130);
       writeValue(buffer, value.index);
-    } else if (value is PlatformProductType) {
+    } else if (value is PlatformReplacementMode) {
       buffer.putUint8(131);
       writeValue(buffer, value.index);
-    } else if (value is PlatformBillingChoiceMode) {
+    } else if (value is PlatformProductType) {
       buffer.putUint8(132);
       writeValue(buffer, value.index);
-    } else if (value is PlatformBillingClientFeature) {
+    } else if (value is PlatformBillingChoiceMode) {
       buffer.putUint8(133);
       writeValue(buffer, value.index);
-    } else if (value is PlatformPurchaseState) {
+    } else if (value is PlatformBillingClientFeature) {
       buffer.putUint8(134);
       writeValue(buffer, value.index);
-    } else if (value is PlatformRecurrenceMode) {
+    } else if (value is PlatformPurchaseState) {
       buffer.putUint8(135);
       writeValue(buffer, value.index);
-    } else if (value is PlatformQueryProduct) {
+    } else if (value is PlatformRecurrenceMode) {
       buffer.putUint8(136);
+      writeValue(buffer, value.index);
+    } else if (value is PlatformQueryProduct) {
+      buffer.putUint8(137);
       writeValue(buffer, value.encode());
     } else if (value is PlatformAccountIdentifiers) {
-      buffer.putUint8(137);
+      buffer.putUint8(138);
       writeValue(buffer, value.encode());
     } else if (value is PlatformBillingResult) {
-      buffer.putUint8(138);
+      buffer.putUint8(139);
       writeValue(buffer, value.encode());
     } else if (value is PlatformOneTimePurchaseOfferDetails) {
-      buffer.putUint8(139);
+      buffer.putUint8(140);
       writeValue(buffer, value.encode());
     } else if (value is PlatformProductDetails) {
-      buffer.putUint8(140);
+      buffer.putUint8(141);
       writeValue(buffer, value.encode());
     } else if (value is PlatformProductDetailsResponse) {
-      buffer.putUint8(141);
+      buffer.putUint8(142);
       writeValue(buffer, value.encode());
     } else if (value
         is PlatformAlternativeBillingOnlyReportingDetailsResponse) {
-      buffer.putUint8(142);
+      buffer.putUint8(143);
+      writeValue(buffer, value.encode());
+    } else if (value is PlatformInAppMessageResult) {
+      buffer.putUint8(144);
       writeValue(buffer, value.encode());
     } else if (value is PlatformBillingConfigResponse) {
-      buffer.putUint8(143);
+      buffer.putUint8(145);
       writeValue(buffer, value.encode());
     } else if (value is PlatformBillingFlowParams) {
-      buffer.putUint8(144);
+      buffer.putUint8(146);
       writeValue(buffer, value.encode());
     } else if (value is PlatformPricingPhase) {
-      buffer.putUint8(145);
+      buffer.putUint8(147);
       writeValue(buffer, value.encode());
     } else if (value is PlatformPurchase) {
-      buffer.putUint8(146);
+      buffer.putUint8(148);
       writeValue(buffer, value.encode());
     } else if (value is PlatformPendingPurchaseUpdate) {
-      buffer.putUint8(147);
+      buffer.putUint8(149);
       writeValue(buffer, value.encode());
     } else if (value is PlatformPurchaseHistoryRecord) {
-      buffer.putUint8(148);
+      buffer.putUint8(150);
       writeValue(buffer, value.encode());
     } else if (value is PlatformPurchaseHistoryResponse) {
-      buffer.putUint8(149);
+      buffer.putUint8(151);
       writeValue(buffer, value.encode());
     } else if (value is PlatformPurchasesResponse) {
-      buffer.putUint8(150);
+      buffer.putUint8(152);
       writeValue(buffer, value.encode());
     } else if (value is PlatformSubscriptionOfferDetails) {
-      buffer.putUint8(151);
+      buffer.putUint8(153);
       writeValue(buffer, value.encode());
     } else if (value is PlatformUserChoiceDetails) {
-      buffer.putUint8(152);
+      buffer.putUint8(154);
       writeValue(buffer, value.encode());
     } else if (value is PlatformUserChoiceProduct) {
-      buffer.putUint8(153);
+      buffer.putUint8(155);
       writeValue(buffer, value.encode());
     } else if (value is PlatformInstallmentPlanDetails) {
-      buffer.putUint8(154);
+      buffer.putUint8(156);
       writeValue(buffer, value.encode());
     } else if (value is PlatformPendingPurchasesParams) {
-      buffer.putUint8(155);
+      buffer.putUint8(157);
       writeValue(buffer, value.encode());
     } else {
       super.writeValue(buffer, value);
@@ -1332,65 +1399,72 @@ class _PigeonCodec extends StandardMessageCodec {
         return value == null ? null : PlatformBillingResponse.values[value];
       case 130:
         final int? value = readValue(buffer) as int?;
-        return value == null ? null : PlatformReplacementMode.values[value];
+        return value == null
+            ? null
+            : PlatformInAppMessageResponse.values[value];
       case 131:
         final int? value = readValue(buffer) as int?;
-        return value == null ? null : PlatformProductType.values[value];
+        return value == null ? null : PlatformReplacementMode.values[value];
       case 132:
         final int? value = readValue(buffer) as int?;
-        return value == null ? null : PlatformBillingChoiceMode.values[value];
+        return value == null ? null : PlatformProductType.values[value];
       case 133:
+        final int? value = readValue(buffer) as int?;
+        return value == null ? null : PlatformBillingChoiceMode.values[value];
+      case 134:
         final int? value = readValue(buffer) as int?;
         return value == null
             ? null
             : PlatformBillingClientFeature.values[value];
-      case 134:
+      case 135:
         final int? value = readValue(buffer) as int?;
         return value == null ? null : PlatformPurchaseState.values[value];
-      case 135:
+      case 136:
         final int? value = readValue(buffer) as int?;
         return value == null ? null : PlatformRecurrenceMode.values[value];
-      case 136:
-        return PlatformQueryProduct.decode(readValue(buffer)!);
       case 137:
-        return PlatformAccountIdentifiers.decode(readValue(buffer)!);
+        return PlatformQueryProduct.decode(readValue(buffer)!);
       case 138:
-        return PlatformBillingResult.decode(readValue(buffer)!);
+        return PlatformAccountIdentifiers.decode(readValue(buffer)!);
       case 139:
-        return PlatformOneTimePurchaseOfferDetails.decode(readValue(buffer)!);
+        return PlatformBillingResult.decode(readValue(buffer)!);
       case 140:
-        return PlatformProductDetails.decode(readValue(buffer)!);
+        return PlatformOneTimePurchaseOfferDetails.decode(readValue(buffer)!);
       case 141:
-        return PlatformProductDetailsResponse.decode(readValue(buffer)!);
+        return PlatformProductDetails.decode(readValue(buffer)!);
       case 142:
+        return PlatformProductDetailsResponse.decode(readValue(buffer)!);
+      case 143:
         return PlatformAlternativeBillingOnlyReportingDetailsResponse.decode(
           readValue(buffer)!,
         );
-      case 143:
-        return PlatformBillingConfigResponse.decode(readValue(buffer)!);
       case 144:
-        return PlatformBillingFlowParams.decode(readValue(buffer)!);
+        return PlatformInAppMessageResult.decode(readValue(buffer)!);
       case 145:
-        return PlatformPricingPhase.decode(readValue(buffer)!);
+        return PlatformBillingConfigResponse.decode(readValue(buffer)!);
       case 146:
-        return PlatformPurchase.decode(readValue(buffer)!);
+        return PlatformBillingFlowParams.decode(readValue(buffer)!);
       case 147:
-        return PlatformPendingPurchaseUpdate.decode(readValue(buffer)!);
+        return PlatformPricingPhase.decode(readValue(buffer)!);
       case 148:
-        return PlatformPurchaseHistoryRecord.decode(readValue(buffer)!);
+        return PlatformPurchase.decode(readValue(buffer)!);
       case 149:
-        return PlatformPurchaseHistoryResponse.decode(readValue(buffer)!);
+        return PlatformPendingPurchaseUpdate.decode(readValue(buffer)!);
       case 150:
-        return PlatformPurchasesResponse.decode(readValue(buffer)!);
+        return PlatformPurchaseHistoryRecord.decode(readValue(buffer)!);
       case 151:
-        return PlatformSubscriptionOfferDetails.decode(readValue(buffer)!);
+        return PlatformPurchaseHistoryResponse.decode(readValue(buffer)!);
       case 152:
-        return PlatformUserChoiceDetails.decode(readValue(buffer)!);
+        return PlatformPurchasesResponse.decode(readValue(buffer)!);
       case 153:
-        return PlatformUserChoiceProduct.decode(readValue(buffer)!);
+        return PlatformSubscriptionOfferDetails.decode(readValue(buffer)!);
       case 154:
-        return PlatformInstallmentPlanDetails.decode(readValue(buffer)!);
+        return PlatformUserChoiceDetails.decode(readValue(buffer)!);
       case 155:
+        return PlatformUserChoiceProduct.decode(readValue(buffer)!);
+      case 156:
+        return PlatformInstallmentPlanDetails.decode(readValue(buffer)!);
+      case 157:
         return PlatformPendingPurchasesParams.decode(readValue(buffer)!);
       default:
         return super.readValueOfType(type, buffer);
@@ -1876,6 +1950,37 @@ class InAppPurchaseApi {
           as PlatformAlternativeBillingOnlyReportingDetailsResponse?)!;
     }
   }
+
+  /// Wraps BillingClient#showInAppMessages().
+  Future<PlatformInAppMessageResult> showInAppMessages() async {
+    final String pigeonVar_channelName =
+        'dev.flutter.pigeon.in_app_purchase_android.InAppPurchaseApi.showInAppMessages$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel =
+        BasicMessageChannel<Object?>(
+          pigeonVar_channelName,
+          pigeonChannelCodec,
+          binaryMessenger: pigeonVar_binaryMessenger,
+        );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(null);
+    final List<Object?>? pigeonVar_replyList =
+        await pigeonVar_sendFuture as List<Object?>?;
+    if (pigeonVar_replyList == null) {
+      throw _createConnectionError(pigeonVar_channelName);
+    } else if (pigeonVar_replyList.length > 1) {
+      throw PlatformException(
+        code: pigeonVar_replyList[0]! as String,
+        message: pigeonVar_replyList[1] as String?,
+        details: pigeonVar_replyList[2],
+      );
+    } else if (pigeonVar_replyList[0] == null) {
+      throw PlatformException(
+        code: 'null-error',
+        message: 'Host platform returned null value for non-null return value.',
+      );
+    } else {
+      return (pigeonVar_replyList[0] as PlatformInAppMessageResult?)!;
+    }
+  }
 }
 
 abstract class InAppPurchaseCallbackApi {
diff --git a/packages/in_app_purchase/in_app_purchase_android/lib/src/pigeon_converters.dart b/packages/in_app_purchase/in_app_purchase_android/lib/src/pigeon_converters.dart
index c3586df9c6a7..dcf22a3acab7 100644
--- a/packages/in_app_purchase/in_app_purchase_android/lib/src/pigeon_converters.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/lib/src/pigeon_converters.dart
@@ -6,6 +6,7 @@ import 'package:in_app_purchase_platform_interface/in_app_purchase_platform_inte
 
 import '../billing_client_wrappers.dart';
 import 'billing_client_wrappers/billing_config_wrapper.dart';
+import 'billing_client_wrappers/in_app_message_wrapper.dart';
 import 'billing_client_wrappers/pending_purchases_params_wrapper.dart';
 import 'messages.g.dart';
 
@@ -130,6 +131,28 @@ alternativeBillingOnlyReportingDetailsWrapperFromPlatform(
   );
 }
 
+/// Converts [PlatformInAppMessageResponse] to its public API enum equivalent.
+InAppMessageResponse inAppMessageResponseFromPlatform(
+  PlatformInAppMessageResponse responseCode,
+) {
+  return switch (responseCode) {
+    PlatformInAppMessageResponse.noActionNeeded =>
+      InAppMessageResponse.noActionNeeded,
+    PlatformInAppMessageResponse.subscriptionStatusUpdated =>
+      InAppMessageResponse.subscriptionStatusUpdated,
+  };
+}
+
+/// Creates a [InAppMessageResultWrapper] from the Pigeon equivalent.
+InAppMessageResultWrapper inAppMessageResultWrapperFromPlatform(
+  PlatformInAppMessageResult result,
+) {
+  return InAppMessageResultWrapper(
+    responseCode: inAppMessageResponseFromPlatform(result.responseCode),
+    purchaseToken: result.purchaseToken,
+  );
+}
+
 /// Creates a [BillingConfigWrapper] from the Pigeon equivalent.
 BillingConfigWrapper billingConfigWrapperFromPlatform(
   PlatformBillingConfigResponse response,
diff --git a/packages/in_app_purchase/in_app_purchase_android/pigeons/messages.dart b/packages/in_app_purchase/in_app_purchase_android/pigeons/messages.dart
index 90f987cc8dfc..8047f94b581c 100644
--- a/packages/in_app_purchase/in_app_purchase_android/pigeons/messages.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/pigeons/messages.dart
@@ -118,6 +118,37 @@ class PlatformAlternativeBillingOnlyReportingDetailsResponse {
   final String externalTransactionToken;
 }
 
+/// Response code for the in-app messaging API call.
+enum PlatformInAppMessageResponse {
+  /// The flow has finished and there is no action needed from developers.
+  ///
+  /// Note: The API callback won't indicate whether message is dismissed by the
+  /// user or there is no message available to the user.
+  noActionNeeded,
+
+  /// The subscription status changed.
+  ///
+  /// For example, a subscription has been rec-
+  /// overed from a suspended state. Developers should expect the purchase token
+  /// to be returned with this response code and use the purchase token with the
+  /// Google Play Developer API.
+  subscriptionStatusUpdated,
+}
+
+/// Results related to in-app messaging.
+class PlatformInAppMessageResult {
+  PlatformInAppMessageResult({
+    required this.responseCode,
+    required this.purchaseToken,
+  });
+
+  /// Returns response code for the in-app messaging API call.
+  final PlatformInAppMessageResponse responseCode;
+
+  /// Returns token that identifies the purchase to be acknowledged, if any.
+  final String? purchaseToken;
+}
+
 /// Pigeon version of BillingConfigWrapper, which contains the components of the
 /// Java BillingConfigResponseListener callback.
 class PlatformBillingConfigResponse {
@@ -443,6 +474,10 @@ abstract class InAppPurchaseApi {
   @async
   PlatformAlternativeBillingOnlyReportingDetailsResponse
   createAlternativeBillingOnlyReportingDetailsAsync();
+
+  /// Wraps BillingClient#showInAppMessages().
+  @async
+  PlatformInAppMessageResult showInAppMessages();
 }
 
 @FlutterApi()
diff --git a/packages/in_app_purchase/in_app_purchase_android/test/billing_client_wrappers/billing_client_wrapper_test.dart b/packages/in_app_purchase/in_app_purchase_android/test/billing_client_wrappers/billing_client_wrapper_test.dart
index 2959ea704712..bf2ed65830c7 100644
--- a/packages/in_app_purchase/in_app_purchase_android/test/billing_client_wrappers/billing_client_wrapper_test.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/test/billing_client_wrappers/billing_client_wrapper_test.dart
@@ -684,6 +684,24 @@ void main() {
       expect(result, expected);
     });
   });
+
+  group('showInAppMessages', () {
+    test('returns object', () async {
+      const expected = InAppMessageResultWrapper(
+        responseCode: InAppMessageResponse.subscriptionStatusUpdated,
+        purchaseToken: 'dummy purchase token',
+      );
+      when(mockApi.showInAppMessages()).thenAnswer(
+        (_) async => PlatformInAppMessageResult(
+          responseCode: PlatformInAppMessageResponse.subscriptionStatusUpdated,
+          purchaseToken: expected.purchaseToken,
+        ),
+      );
+      final InAppMessageResultWrapper result = await billingClient
+          .showInAppMessages();
+      expect(result, expected);
+    });
+  });
 }
 
 PlatformBillingConfigResponse platformBillingConfigFromWrapper(
diff --git a/packages/in_app_purchase/in_app_purchase_android/test/billing_client_wrappers/billing_client_wrapper_test.mocks.dart b/packages/in_app_purchase/in_app_purchase_android/test/billing_client_wrappers/billing_client_wrapper_test.mocks.dart
index e8d4c2c38e67..30c4526d7742 100644
--- a/packages/in_app_purchase/in_app_purchase_android/test/billing_client_wrappers/billing_client_wrapper_test.mocks.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/test/billing_client_wrappers/billing_client_wrapper_test.mocks.dart
@@ -1,4 +1,4 @@
-// Mocks generated by Mockito 5.4.4 from annotations
+// Mocks generated by Mockito 5.4.6 from annotations
 // in in_app_purchase_android/test/billing_client_wrappers/billing_client_wrapper_test.dart.
 // Do not manually edit this file.
 
@@ -67,6 +67,12 @@ class _FakePlatformAlternativeBillingOnlyReportingDetailsResponse_5
   ) : super(parent, parentInvocation);
 }
 
+class _FakePlatformInAppMessageResult_6 extends _i1.SmartFake
+    implements _i2.PlatformInAppMessageResult {
+  _FakePlatformInAppMessageResult_6(Object parent, Invocation parentInvocation)
+    : super(parent, parentInvocation);
+}
+
 /// A class which mocks [InAppPurchaseApi].
 ///
 /// See the documentation for Mockito's code generation for more information.
@@ -390,4 +396,24 @@ class MockInAppPurchaseApi extends _i1.Mock implements _i2.InAppPurchaseApi {
           as _i4.Future<
             _i2.PlatformAlternativeBillingOnlyReportingDetailsResponse
           >);
+
+  @override
+  _i4.Future<_i2.PlatformInAppMessageResult> showInAppMessages() =>
+      (super.noSuchMethod(
+            Invocation.method(#showInAppMessages, []),
+            returnValue: _i4.Future<_i2.PlatformInAppMessageResult>.value(
+              _FakePlatformInAppMessageResult_6(
+                this,
+                Invocation.method(#showInAppMessages, []),
+              ),
+            ),
+            returnValueForMissingStub:
+                _i4.Future<_i2.PlatformInAppMessageResult>.value(
+                  _FakePlatformInAppMessageResult_6(
+                    this,
+                    Invocation.method(#showInAppMessages, []),
+                  ),
+                ),
+          )
+          as _i4.Future<_i2.PlatformInAppMessageResult>);
 }