Top 4 in-app-purchases open source projects

IAP server sample encapsulates APIs of the HUAWEI IAP server. It provides many sample programs for your reference or usage. The repository contains 8 branches of java, csharp, golang, nodejs, perl, php, python and ruby demo.

Unity SDK for cross-platform (iOS and Android) in-app purchase and subscription infrastructure, revenue analytics, engagement automation, and integrations

Implementing and testing In-App Purchases with StoreKit2 and StoreHelper in Xcode 13, Swift 5.5, SwiftUI, iOS 15 and macOS 12.

([Swift] https://github.com/chenxing640/DYFStore) A lightweight and easy-to-use iOS library for In-App Purchases (Objective-C). DYFStoreKit uses blocks and notifications to wrap StoreKit, provides receipt verification and transaction persistence and doesn't require any external dependencies.