Build Your First App with Codex (No Experience Needed)

The distance between an app idea and that app running on your phone has collapsed. With OpenAI Codex you don't need to write the code, but you do need the workflow, and that's what most people are missing. I take you to the first real milestone: your own app, on your own phone, iOS and Android.

The app is just the vehicle. The workflow in the video is what you keep.

What's inside

• Install Expo Go for SDK 55, via TestFlight on iOS or the APK on Android
• Set up Bun once and verify it works
• Scaffold an Expo project on the right SDK version instead of burning AI tokens
• Start the server with npx expo start and scan the QR code
• Sign in to Expo Go so your project actually loads
• Reload after changes and add Expo agent skills inside Codex

Resources

BookFrom Idea to App Store with Claude Code

The same idea-to-App-Store mental model, in depth: plan, prompt, and ship without writing code.