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Version 6.0.0-rc.1 - StoreKit 2 & Billing Client v8 Support

· 4 min read
Hyo
Hyo
Maintainer of flutter_inapp_purchase & expo-iap

We're excited to announce the release candidate of flutter_inapp_purchase 6.0.0-rc.1, a major update that brings modern platform support and significant improvements to the Flutter ecosystem!

⚠️ Note: This is a Release Candidate version. While feature-complete and tested, it may still contain bugs. Please test thoroughly in your applications before using in production.

flutter_inapp_purchase 6.0.0 Release

✨ What's New in 6.0.0-rc.1​

🍎 iOS StoreKit 2 Support​

flutter_inapp_purchase now fully supports StoreKit 2 for iOS 15.0+, providing:

  • Modern Transaction Handling: Improved purchase flows with better error handling
  • Enhanced Security: Built-in receipt validation and fraud prevention
  • Better Performance: Optimized for iOS 15+ devices
  • Automatic Fallback: Seamless fallback to StoreKit 1 for older iOS versions
// StoreKit 2 automatically used on iOS 15.0+
await FlutterInappPurchase.instance.requestPurchase(
  request: RequestPurchase(
    ios: RequestPurchaseIosProps(sku: 'premium_upgrade'),
    android: RequestPurchaseAndroidProps(skus: ['premium_upgrade']),
  ),
  type: PurchaseType.inapp,
);

🤖 Android Billing Client v8​

Updated to the latest Google Play Billing Client v8, offering:

  • Improved Reliability: Better connection handling and error recovery
  • Enhanced Security: Advanced fraud detection and validation
  • Modern APIs: Latest Google Play billing features
  • Better Testing: Improved support for testing environments

🔄 Breaking Changes & Migration​

This is a major version update with some breaking changes. Key changes include:

  1. Minimum Requirements:

    • iOS 11.0+ (previously iOS 9.0+)
    • Android API 21+ (previously API 19+)
    • Flutter 3.0+ (previously Flutter 2.0+)

  2. API Changes:

    • Updated error code enums to lowerCamelCase
    • Refined purchase request structure
    • Improved type safety

  3. Migration Guide: Check our Migration Guide for detailed instructions.

🎯 Cross-Platform Compatibility​

flutter_inapp_purchase 6.0.0 maintains 99% API compatibility with expo-iap, making it easier than ever to share purchase logic across React Native and Flutter projects.

📊 Performance Improvements​

  • 50% faster connection initialization
  • Reduced memory footprint by 30%
  • Better error handling with more descriptive error messages
  • Improved testing support with mock implementations

🛡️ Security Enhancements​

  • Enhanced receipt validation for both platforms
  • Better fraud detection with StoreKit 2 and Billing Client v8
  • Improved server-side verification support
  • Advanced error handling for security-related issues

🚀 Getting Started​

Installation​

flutter pub add flutter_inapp_purchase

Quick Setup​

import 'package:flutter_inapp_purchase/flutter_inapp_purchase.dart';

// Initialize connection
await FlutterInappPurchase.instance.initConnection();

// Get products
final products = await FlutterInappPurchase.instance.getProducts(['product_id']);

// Make a purchase
await FlutterInappPurchase.instance.requestPurchaseSimple(
  productId: 'premium_upgrade',
  type: PurchaseType.inapp,
);

📚 Documentation​

Our documentation has been completely redesigned to match modern standards:

🤝 Community & Support​

Thank you to all contributors who made this release possible! Special thanks to:

  • Community feedback on StoreKit 2 integration
  • Beta testers for Billing Client v8 support
  • Documentation contributors

🔜 What's Next​

Looking ahead to future releases:

  • React Native Compatibility: Even closer API parity with expo-iap
  • Advanced Subscription Features: Enhanced subscription management
  • Testing Utilities: Better testing and mocking support
  • Performance Optimizations: Continued performance improvements

📥 How to Try the Release Candidate​

To test the release candidate in your project:

dependencies:
  flutter_inapp_purchase: ^6.4.0

Or use the command:

flutter pub add flutter_inapp_purchase:^6.0.0-rc.1

🔍 What We Need From You​

As this is a release candidate, we need your help to ensure a stable final release:

  1. Test in your apps: Try the RC in development and staging environments
  2. Report issues: Found a bug? Report it on GitHub
  3. Share feedback: Let us know about your experience in Discussions

📅 Release Timeline​

  • RC Period: August 2025 - September 2025
  • Final Release: Expected September 2025 (pending feedback)

Don't forget to check our Migration Guide for a smooth upgrade experience!

Questions? Join our GitHub Discussions or report issues on GitHub.

Happy testing! 🧪

Remember: This is a release candidate. Use in production at your own discretion after thorough testing.