The short answer
If your team already writes React and your app is largely product surfaces and data, React Native lets you reuse skills and share logic with the web. If you want tight control over rendering and consistent visuals across platforms, Flutter gives you that at the cost of a separate language and ecosystem. Both are production-grade; the wrong choice is usually about team fit, not technology.
What actually differentiates them
Team and hiring
- React Native reuses React knowledge you likely already have.
- Flutter needs Dart, which is a real ramp for a JavaScript team.
Rendering
- Flutter draws its own widgets, so the UI is identical across platforms.
- React Native uses native components, so it inherits platform look and behaviour.
Native integration
- Anything unusual — a specific SDK, a hardware feature — eventually means writing native code in both.
Where cross-platform stops being the answer
- Heavy real-time graphics or camera processing.
- Deep platform integrations that end up as two native modules anyway.
- A team that only knows one platform and only ships to that platform.
Exec9 builds with both React Native and Flutter — including RizzDate, a voice-first dating application for Android and iOS built with React Native, Node.js, Socket.io, and Firebase.