React Native and Expo help you build mobile apps for iOS and Android. But apps can feel slow if lists and animations are not optimized. This guide shares the best ways to keep your app fast and smooth.
List performance is the most important part. Use FlatList or FlashList instead of ScrollView. Add keyExtractor and getItemLayout. For animations, use Reanimated to run them on the UI thread. This stops jank and makes gestures feel natural.
If you build or review React Native code, these patterns will save you time. They cover navigation, state management, and Expo workflows too.
Global
mkdir -p ~/.claude/skills/react-nativeProject
mkdir -p .claude/skills/react-nativeSource Repository
Vercel React Native Skillsvercel-labs/agent-skills
Build fast and smooth React Native apps with proven best practices
Building Native Uiexpo/skills
Build native mobile interfaces with Expo Router and modern UI patterns
Xcode Project Setupfirebase/agent-skills
Add Swift packages and files to Xcode projects safely and quickly
Upgrading Expoexpo/skills
Upgrade Expo SDK versions and fix dependencies with this step by step guide
Expo Deploymentexpo/skills
Deploy Expo apps to iOS, Android, and web with EAS automation
Expo Dev Clientexpo/skills
Build custom Expo dev clients for testing native code on real devices
Use Domexpo/skills
Run web code in native apps using Expo DOM components without rewriting
Flutter Apply Architecture Best Practicesflutter/skills
Architect Flutter apps with clean layers for scalability and maintainability