Cross-platform subscription state: sharing entitlements between Android and iOS

Subscription apps need to work seamlessly across different platforms, like iOS and Android, but achieving this is challenging due to the fundamentally different systems of Google Play Billing and Apple's StoreKit. These platforms have distinct receipt formats, verification processes, notification systems, and product structures, creating significant barriers to interoperability. Developers must build complex infrastructure to synchronize subscriptions across platforms, including dual receipt verification, unified user identity, platform-agnostic entitlement storage, and separate notification processing pipelines. This requires substantial effort and ongoing maintenance, which can be particularly burdensome for small teams or indie developers. RevenueCat offers a solution by providing a unified identity and entitlement system that abstracts these differences, allowing developers to manage cross-platform subscriptions with minimal effort. By using RevenueCat, developers can focus on enhancing their apps rather than dealing with the complexities of cross-platform subscription infrastructure.