React Native lets you ship a real Android and iOS app from one JavaScript codebase. It powers Instagram, Shopify, Discord, Coinbase and Microsoft Office mobile — and for a developer who already knows React on the web, it is the shortest route into mobile engineering.

This course assumes you can already write JavaScript and basic React. It does not re-teach components, props or hooks from scratch. Instead it covers what actually changes when React leaves the browser: there is no DOM and no CSS, layout is Flexbox-only in density-independent pixels, lists must be virtualised or the app drops frames, navigation is a native stack rather than a URL, and every device capability sits behind a permission prompt that behaves differently on Android and iOS.

You will work through the architecture (JS thread, native thread, the bridge and the new Fabric/TurboModule model), the core components and styling system, state and re-render behaviour on a mobile device, FlatList performance tuning, React Navigation, forms and keyboard handling, networking with offline and sync, platform APIs and permissions, native modules and animations, debugging and testing, and finally build signing and store submission.

Every lesson is followed by practice questions, and Android-vs-iOS differences are called out explicitly throughout — those differences are where most React Native interviews and most production bugs actually live.