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Cross-Platform In-App Purchases: iOS, Android & Stripe in One Codebase

How we unified subscription billing across App Store, Google Play, and Stripe for web with a single source-of-truth backend and webhook reconciliation.

Neosys Engineering Team

Full-Stack Core

Jun 18, 2026 7 min read

💡 Key Takeaways & Architecture Summary

  • Unified subscription status schema handles Apple StoreKit 2, Google Play Billing v6, and Stripe Webhooks.
  • Idempotent server-to-server webhook processing guarantees zero double-billing or missed renewals.
  • Grace period and auto-retry logic prevents accidental churn during credit card updates.

The Multi-Channel Billing Complexity

Managing active entitlements across iOS App Store, Google Play Store, and web checkout often turns into a nightmare of fragmented databases. We designed a central entitlement engine that listens to validated webhook events across all payment providers.

Tags:
#Stripe
#In-App Purchase
#React Native
#Node.js
#Webhooks
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