Cross-platform subscriptions with one entitlement across every store

Repair order

• Two billing systems that do not match

  StoreKit 2 and Google Play Billing model products, receipts, and server notifications differently. Apple gives you signed transactions and JWS, Google gives you purchase tokens and Real-time Developer Notifications, and the product setup in each console follows its own rules. I build the native purchase flow on each side so it follows the platform's intended pattern, then map both into a single internal model your backend understands.

• One entitlement, every platform

  A user who subscribes on iPhone expects to be subscribed on their Android tablet, their Apple TV, and the website. That only works if entitlement lives on your server, not inside one app. I wire both stores to a single source of truth so access is consistent everywhere, and so the app asks your backend what the user can access rather than guessing from a local receipt.

• Server-side verification and notifications

  Trusting the client alone invites fraud and breaks on refunds. I implement server-side verification of Apple's JWS transactions and Google's purchase tokens, and handle the server notifications that report renewals, cancellations, billing retries, and refunds. This keeps entitlement accurate even when the change happens outside the app, for example when a user cancels from the store settings.

• Trials, restores, fees, and RevenueCat

  Free trials, introductory offers, and restore purchases each have platform-specific behavior that confuses users when done wrong. The store fee is also real: roughly 15 to 30 percent depending on program and tenure. I implement these flows directly, and if you prefer, integrate RevenueCat to centralize receipts and reporting. I will give you an honest view of when RevenueCat saves time and when going direct is simpler.