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TUTORIAL

Building Cross-Platform Apps with React Native

Ejaz Shaikh
Ejaz Shaikh•Mar 01, 2025•8 min read
Building Cross-Platform Apps with React Native

React Native has changed the way mobile apps are built. Instead of maintaining two separate codebases for iOS and Android, teams can now write once and deploy everywhere.

Getting Started

First, set up your environment:

BASH
npx create-expo-app my-app
cd my-app
npx expo start

Core Concepts

React Native maps JavaScript components directly to native UI elements. A `<View>` becomes a `UIView` on iOS and an `android.view.View` on Android.

Performance Tips

  • Use `FlatList` instead of `ScrollView` for long lists
  • Avoid anonymous functions in render
  • Use `useCallback` and `useMemo` aggressively

    • React Native is production-ready and powers apps at Meta, Shopify, and Microsoft.

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