How to integrate Firebase authentication and RevenueCat subscriptions in mobile apps

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KMPShip

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KMPShip is a paid boilerplate that helps you launch Android and iOS apps in days, not months. It comes with Compose Multiplatform, Firebase Auth, notifications, analytics, RevenueCat subscriptions, CI/CD, and more already integrated. Developers get a solid, production-ready foundation out of the box, so they can focus on building features instead of setup.

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What to expect from an ideal product

1. KMPShip comes with Firebase Auth and RevenueCat already connected and working together, so you don't have to figure out the integration yourself
2. The boilerplate includes pre-built user flows that handle sign-in, subscription purchase, and account management all in one smooth experience
3. You get ready-made code that syncs user authentication with their subscription status, making sure only paying users can access premium features
4. The template handles tricky edge cases like subscription renewals, cancellations, and restores while keeping users properly authenticated
5. Everything is set up to work on both Android and iOS from day one, saving you from writing separate integration code for each platform

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