Finalize Expo React Native App

I have a nearly finished Expo React Native app, built using Visual Studio Code, that requires a developer to complete the final steps before publishing to both Android and iOS app stores. The app runs well in development but needs additional work for successful submission.

Here’s what I need:

- Address remaining hydration and build issues. Specifically, on Android, this includes resolving crashes during the build process and fixing UI/UX issues that occur while components are loading. On iOS, the focus should be on ensuring readiness for store submission.
- Integrate RevenueCat for in-app subscriptions, including both basic and premium tiers. Make sure entitlement unlocks work seamlessly.
- Create clean EAS Dev Client builds for both platforms.
- Ensure the app complies with App Store and Google Play submission guidelines and is ready to publish.

You should be proficient with Expo SDK 53+, EAS Build, react-native-purchases, and have a solid understanding of submission best practices for both platforms. Let’s ensure this app is polished and publication-ready!