The standardized protocol for implementing in-app purchases across all platforms
OpenIAP is a unified specification for in-app purchases across platforms, frameworks, and emerging technologies.
The OpenIAP specification standardizes IAP implementations to reduce fragmentation and enable consistent behavior across all platforms. This is especially critical in the AI coding era where standardized APIs enable better code generation.
This monorepo contains all OpenIAP packages:
- docs - Documentation site at openiap.dev
- spec - OpenIAP specification and type generation
- google - Android library
- apple - iOS/macOS library
- kit - Hosted receipt-validation backend (SaaS + dashboard at kit.openiap.dev). Free for everyone.
Framework SDK implementations built on top of OpenIAP. These libraries are managed in this monorepo — see discussion #86 for the rationale and migration context.
| Library | Platform | Package | Downloads |
|---|---|---|---|
| expo-iap | Expo |  |
 |
| react-native-iap | React Native |  |
 |
| flutter_inapp_purchase | Flutter |  |
 |
| kmp-iap | Kotlin Multiplatform |  |
— |
| maui-iap | .NET MAUI |  |
 |
| godot-iap | Godot 4.x |  |
— |
Visit openiap.dev for complete documentation and API reference.
Have a question or need help? Ask in the relevant GitHub Discussions category:
| Library | Discussion |
|---|---|
| openiap-apple | Q&A |
| openiap-google | Q&A |
| expo-iap | Q&A |
| react-native-iap | Q&A |
| flutter_inapp_purchase | Q&A |
| kmp-iap | Q&A |
| maui-iap | Q&A |
| godot-iap | Q&A |
For bug reports, please open an issue.
See CONTRIBUTING.md for development setup, workflows, and contribution guidelines.
Thank you to our sponsors for supporting the OpenIAP initiative. Become a sponsor