Find The Latest Tech Insights, News and Updates to Read

Flutter and In-App Purchases: Monetizing Your App

Written by Achin Verma | Apr 15, 2024 10:34:38 AM

Introduction

  • The importance of in-app purchases (IAP) as a revenue model for mobile applications.
  • Overview of how Flutter supports in-app purchases for both Android and iOS.
  • The potential benefits of integrating in-app purchases into a Flutter app.

Creating In-App Products on Google Play Console and Apple Developer Center

Google Play Console

  • Log in to Google Play Console:

    • Navigate to the Google Play Console.

    • Log in with your Google account.

  • Select Your App:

    • Choose the app for which you want to add in-app products.

  • Go to "Monetize" Section:

    • In the left menu, click on "Monetize" to access the Monetization setup.


  • Add a New Product:

    • Click on the "Products" tab and then the "+" button to add a new product.

  • Choose Product Type:

    • Select the appropriate product type (in-app purchases, subscriptions, etc.).

  • Configure Product Details:

    • Provide the necessary details, including the product's title, description, price, and any other required information.

  • Define Pricing:

    • Set the pricing for your in-app product. You can set different prices for different regions if needed.

  • Save and Activate:

    • Save your changes and activate the in-app product. This makes it available for users to purchase.

  • Testing License Key:

    • If you are testing in-app purchases, you can use a test license key. Copy the key from the "Services & APIs" section in the Google Play Console.

  • Publish Changes:

    • Once you've configured your in-app product, remember to click "Save" or "Publish" to apply the changes.

Apple Developer Center

  • Log in to Apple Developer Center:

  • Access App Store Connect:

    • In the developer account, access the "App Store Connect" section.

  • Select Your App:

    • Choose the app for which you want to set up in-app purchases.

  • Go to "In-App Purchases" Section:

    • In the left sidebar, click on "In-App Purchases."

  • Add a New In-App Purchase:

    • Click the "+" button to add a new in-app purchase.

  • Choose Product Type:

    • Select the type of in-app purchase you want to create (consumable, non-consumable, auto-renewable subscription, etc.).

  • Configure In-App Purchase Details:

    • Provide details such as the reference name, product ID, pricing, and any other required information.

  • Define Pricing and Availability:

    • Set the pricing for your in-app product. You can also define availability in different regions.

  • Review and Submit:

    • Review your in-app purchase details and make sure everything is configured correctly.

  • Submit for Review (if required):

    • If your app is not in the "Ready for Sale" state, you may need to submit the in-app purchase for review.

  • Testing with Sandbox Tester:

    • To test in-app purchases, set up a sandbox tester account in the "Users and Access" section. Use this account to test the in-app purchase flow during development.

  • Save Changes:

    • Save your changes in App Store Connect.

Setting Up In-App Purchases in a Flutter Project

  • Understanding In-App Purchases
  • Explanation of in-app purchases and the types (consumables, non-consumables, subscriptions).
  • Overview of the In-App Purchases (IAP) plugin in Flutter.
  • Adding the IAP Plugin to Flutter
  • Incorporating the in_app_purchase package into the Flutter project.
  • Initializing the plugin and handling necessary permissions.

 

# pubspec.yaml
dependencies:
  in_app_purchase: ^latest_version

 

// Example: Initializing In-App Purchases in Flutter
import 'package:in_app_purchase/in_app_purchase.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  InAppPurchaseConnection.enablePendingPurchases();
  runApp(MyApp());
}

Implementing Basic In-App Purchases

  • Displaying Products for Purchase
  • Retrieving and displaying available products for purchase.
  • Customizing the user interface for presenting in-app purchase options.

// Example: Displaying products for purchase
final ProductDetailsResponse response = await InAppPurchaseConnection.instance.queryProductDetails(productIds);
final List<ProductDetails> products = response.productDetails;

// Display products to the user

 

Initiating the Purchase Process

  • Implementing the logic to initiate the in-app purchase process.
  • Handling the purchase flow based on user interactions.

 

// Example: Initiating the in-app purchase process
InAppPurchaseConnection.instance.buyConsumable(purchaseParam: PurchaseParam(productDetails: product));


Handling In-App Purchase Transactions

  • Verifying Purchases and Consumables
  • Verifying the legitimacy of in-app purchases.
  • Handling consumable purchases and updating app state accordingly.

 

// Example: Verifying and handling consumable purchases
final QueryPurchaseDetailsResponse response = await InAppPurchaseConnection.instance.queryPastPurchases();
for (PurchaseDetails purchase in response.pastPurchases) {
  if (purchase.status == PurchaseStatus.purchased) {
    // Handle purchased item
  }
}


Restoring Purchases

  • Implementing a mechanism to restore previous purchases.
  • Ensuring a seamless experience for users who reinstall the app.

 

// Example: Restoring previous purchases
await InAppPurchaseConnection.instance.restorePurchases();

Implementing Subscriptions and Upgrades

  • Integrating Subscriptions
  • Understanding the structure of subscription-based in-app purchases.
  • Implementing the purchase flow for subscriptions.

 

// Example: Initiating subscription purchase
InAppPurchaseConnection.instance.buyNonConsumable(purchaseParam: PurchaseParam(productDetails: subscriptionProduct));

 

Handling Subscription Renewals and Cancellations

  • Managing subscription lifecycle events, including renewals and cancellations.
  • Updating app features based on the user's subscription status.

 

// Example: Handling subscription status changes
InAppPurchaseConnection.instance.purchaseUpdatedStream.listen((List<PurchaseDetails> purchaseDetailsList) {
  // Handle subscription updates
});


Testing and Debugging In-App Purchases

  • Testing In-App Purchases Locally
  • Configuring a test environment for in-app purchases in Flutter.
  • Utilizing a testing account to simulate purchases.

 

// Example: Testing in-app purchases locally
InAppPurchaseConnection.enablePendingPurchases();


Debugging In-App Purchase Issues

  • Techniques for debugging common issues with in-app purchases.
  • Utilizing Flutter's debugging tools for in-app purchase inspection.
  • Code snippets showcasing debugging practices.

 

flutter run --enable-software-rendering

Conclusion

  • Recap of key steps in implementing in-app purchases in a Flutter app.
  • Encouragement for developers to explore various in-app purchase models.
  • Reminders about the importance of testing and monitoring in-app purchase implementations.
  • Remember to consult the documentation for both Google Play In-app Billing and Apple In-App Purchase to ensure compliance with their guidelines and to stay updated on any changes to the submission process.

Hire Flutter developers to elevate your Flutter app design. Unlock the full potential of Flutter layouts with our professional Flutter developers.