React Native vs Flutter: Which Should You Choose?
React Native and Flutter are the two dominant cross-platform mobile frameworks. Both let you build iOS and Android apps from a single codebase — but they take fundamentally different approaches. Here’s an honest comparison.
Quick Comparison
| React Native | Flutter | |
|---|---|---|
| Language | JavaScript / TypeScript | Dart |
| By | Meta (Facebook) | |
| UI rendering | Native platform components | Custom engine (Impeller) |
| Code sharing | ~70–90% shared | ~95%+ shared |
| Performance | Near-native | Native-quality, 60/120fps |
| UI consistency | Follows platform norms | Pixel-identical across platforms |
| Ecosystem | Large (npm) | Growing (pub.dev) |
| Web support | Via React Native Web | Yes (Flutter Web) |
| OTA updates | Yes (Expo Updates, CodePush) | Limited |
| Learning curve | Lower (if JS background) | Higher (Dart) |
The Core Difference
The most important difference between React Native and Flutter is how they render UI:
React Native — Native Components. React Native maps its components to the host platform’s native UI elements. A <Button> becomes a native iOS UIButton or Android Button. The UI behaves exactly like the platform expects because it is the platform’s native component.
Flutter — Custom Rendering Engine. Flutter draws every pixel itself using Impeller (its rendering engine). It does not use native platform components at all. This means the UI is pixel-identical on both platforms — but it also means Flutter does not automatically follow platform UI conventions.
When to Choose React Native
- Your team knows JavaScript: React Native uses JavaScript and React. If your team already works in JS or React for web, the learning curve is minimal.
- Code sharing with web: Business logic (API calls, state management, data models) can be shared between a React Native app and a React web app.
- OTA updates are important: React Native allows JavaScript bundle updates to be pushed directly to users via Expo Updates — no App Store review needed for fixes.
- You prefer platform-native UI: React Native produces UI that feels native to each platform because it uses the platform’s own components.
When to Choose Flutter
- Custom UI design is the priority: Flutter’s custom rendering engine makes pixel-perfect custom designs easier — you’re not fighting against platform UI conventions.
- UI consistency across platforms: If your app needs to look identical on iOS and Android (enterprise apps, brand-controlled experiences), Flutter guarantees it.
- High-performance animations: Flutter’s 60/120fps rendering pipeline and Impeller make complex custom animations smoother to implement than in React Native.
- Multi-platform (beyond mobile): Flutter targets iOS, Android, web, macOS, Windows, and Linux from a single codebase — React Native focuses primarily on mobile.
The Verdict
Both are excellent production-grade frameworks used by large companies globally. The choice comes down to team background and app requirements — not one being objectively better than the other.
Choose React Native if your team has JavaScript experience, you want code sharing with a React web app, or you value platform-native UI patterns. Choose Flutter if you need a highly custom UI, pixel-perfect cross-platform consistency, or plan to expand to desktop.
Elmeris builds with both. See our React Native development services and Flutter development services, or get in touch for a recommendation tailored to your project.