What You're Building

You will create a cross-platform mobile app that runs natively on iOS and Android devices. The app will have multiple screens with smooth navigation, connect to a backend API for data storage and user authentication, and support push notifications. The final product will be ready for submission to Apple App Store and Google Play Store using Expo's EAS Build service.

Before You Start

Ensure you have a solid understanding of JavaScript and React. Create accounts on Expo (https://expo.dev), Supabase (https://supabase.com), and Apple Developer Program ($99/year) as well as Google Play Console ($25 one-time fee). Decide on your app’s core features and design a simple navigation flow. Install Node.js (v16+), and set up your preferred code editor (Cursor or Windsurf recommended).

Step-by-Step Approach

  1. Initialize your Expo project: Run npx create-expo-app my-app and choose the managed workflow. This sets up the React Native environment with Expo's tooling.
  2. Build your screens and navigation: Use React Navigation to create stack and tab navigators. Structure your app with functional components and style with StyleSheet or Tailwind CSS.
  3. Integrate Supabase backend: Set up your database schema and authentication in Supabase. Connect your app using the Supabase JS client to handle sign-in, sign-up, and data queries.
  4. Implement API calls and state management: Use React Query or Context API to manage remote data fetching and caching. Handle loading and error states gracefully.
  5. Test on physical devices: Use the Expo Go app to run your app on iOS and Android devices during development for real-world testing.
  6. Configure EAS Build: Set up your eas.json with build profiles, configure app icons, splash screens, and permissions. Run eas build --platform all to generate production-ready binaries.
  7. Submit to app stores: Use Expo Application Services to automate submission to Apple and Google stores. Follow store guidelines for metadata, screenshots, and compliance.

Realistic Time Estimates

  • First prototype: 1–2 days to get a basic app running with navigation and dummy data.
  • MVP with backend integration: 1–2 weeks to implement authentication, real data fetching, and basic UI polish.
  • Production-ready app: 3–6 weeks including testing, performance optimization, app store compliance, and deployment.

Common Mistakes and How to Avoid Them

  • Ignoring platform differences: Test on both iOS and Android early to catch UI or permission issues specific to each OS.
  • Underestimating app store requirements: Read Apple and Google guidelines carefully to avoid rejections due to metadata, privacy policies, or functionality.
  • Skipping error handling: Always handle API errors and loading states to prevent crashes and poor UX.
  • Overcomplicating navigation: Keep navigation simple and intuitive; complex nested navigators can confuse users and developers alike.

When Vibe Coding Works Well Here

Vibe coding accelerates development when you have clear goals and can iterate quickly on UI and API integration. The recommended stack’s tooling and Expo’s managed workflow reduce setup friction and let you focus on building features. AI-assisted editors like Cursor help speed up boilerplate and repetitive code.

When It Doesn't

If your app requires heavy custom native modules or complex background processing, Expo’s managed workflow can become limiting. Also, if you lack React or JavaScript experience, the learning curve may slow you down despite the tooling. For very large teams or enterprise apps, more robust backend and CI/CD pipelines might be necessary beyond this stack.