If you are planning a mobile app and your team (or your budget) does not support separate native development for iOS and Android, the choice often comes down to two options: React Native and Flutter. Both mature, both supported by large organizations, both capable of producing quality apps. But with substantial differences that matter in practice.
React Native: JavaScript in the Mobile World
React Native is developed by Meta (Facebook) and uses JavaScript/TypeScript as its primary language. It translates code into native platform components via a bridge (or, in the new architecture, via JSI — JavaScript Interface).
Advantages:
- If your team already knows React for the web, the learning curve is reduced
- Huge npm ecosystem: thousands of available libraries
- Large community and framework maturity (since 2015)
- Simpler integration with existing native code in certain contexts
- Expo: a toolchain that greatly simplifies development and deployment
Disadvantages:
- The JavaScript-native bridge (legacy architecture) introduces latency in computationally intensive scenarios
- Lower performance than Flutter in complex animations
- Fragmentation: framework updates sometimes break compatibility with third-party libraries
- The new architecture (Fabric + JSI) is stable, but the library ecosystem is still completing the migration
Flutter: Dart and Proprietary Rendering
Flutter is developed by Google and uses Dart as its language. Unlike React Native, it doesn’t use native platform components: it draws every pixel through its own graphics engine (Skia/Impeller). This makes it visually identical across all platforms.
Advantages:
- Excellent performance, especially for animations and complex UIs
- Perfect visual consistency across iOS, Android, web, and desktop
- Fast hot reload during development
- Rapid ecosystem growth over the last three years
- Official Google support with a clear roadmap
Disadvantages:
- Dart is a less common language: recruiting is more difficult
- Apps tend to have slightly larger sizes
- Integration with platform-specific native components can be more complex
- Proprietary rendering means the app might not exactly follow iOS or Android visual conventions (pro or con depending on the case)
The Comparison That Matters
| Criterion | React Native | Flutter |
|---|---|---|
| Language | JavaScript/TypeScript | Dart |
| UI Performance | Good | Excellent |
| Animation Performance | Medium | Excellent |
| Cross-platform consistency | Partial | Total |
| Available dev team size | Large | Growing |
| Ecosystem maturity | High | Medium-High |
| Native code integration | Simpler | More structured |
| Web/desktop support | Partial | Native |
When to Choose React Native
- The team already has React experience
- The project requires integration with many existing JavaScript libraries
- The app must frequently interact with specific native platform features
- The budget for team training is limited
When to Choose Flutter
- Complex UI with custom animations is a requirement
- Perfect visual consistency between iOS and Android is desired
- The project also includes a desktop or web version with the same codebase
- Starting from scratch with no dependencies on existing JavaScript code
The Real Question: Cross-Platform Framework vs Pure Native
Before choosing between React Native and Flutter, it’s worth asking if a cross-platform framework is truly the right choice.
Native development (Swift for iOS, Kotlin for Android) remains superior in:
- Maximum performance (games, AR, video processing)
- Access to next-generation hardware features not yet supported by cross-platform frameworks
- Deep integration with the UX conventions of each platform
The cost is real: two codebases, two teams (or one with more specialized skills), longer times. But for some products, it’s the right choice.
Our Position
At Marfcode, we primarily work with React Native and Expo for consumer projects and Flutter for projects with high UI requirements or multi-platform targets (mobile + web + desktop with a single codebase).
We don’t have ideological preferences: we choose based on project requirements, the skills of the client’s team (if they must maintain the code internally), and long-term goals.
→ Let’s talk about your mobile app project
Related article: Progressive Web App: when it makes sense compared to a native app | How much does it cost to develop a professional site or app
