React Native

React Native is React at heart — understand components, JSX, and props before anything mobile.

Expo is now the officially recommended way to start — it spares you setup pain so you focus on code.

On mobile there's no div — you use View, Text, and Image, and style with StyleSheet and Flexbox.

Hooks are the engine of interactivity — useState and useEffect underpin any live screen.

A real app is more than one screen — file-based navigation is now the modern approach.

Long lists kill performance if done wrong — FlatList and FlashList render only what's visible.

Most apps talk to a server — handling loading, errors, and caching right shapes the user experience.

When data is shared across many screens, you need global state and storage that survives app restarts.

Mobile's power is camera, location, and notifications — Expo modules reach them with minimal hassle.

Sometimes you need pure native code — the New Architecture (Fabric, TurboModules) opens deeper doors.

Smooth motion makes an app feel native — Reanimated runs animations on the UI thread.

Debugging and testing separate a dev who burns hours from one who ships with confidence.

The final step: build production releases and ship to both stores — EAS automates this and supports OTA updates.