Pick React Native when your team already writes React and TypeScript, when you want the app to use the platform's own native UI components, or when over-the-air JavaScript updates through Expo matter to your release process. Pick Flutter when you want pixel-identical custom UI across iOS and Android, a single toolkit that also targets web and desktop, and a team willing to work in Dart. Both ship serious production apps; the deciding factors are your existing skills and how custom your design is.
For typical business apps (lists, forms, navigation, network data), both are fast enough that users cannot tell. React Native's older bridge, which serialized messages between JavaScript and native code, was the source of its reputation for jank; the New Architecture replaces it with JSI for direct calls and Fabric for rendering. Flutter's risk is different: very large widget rebuilds or expensive layouts on every frame. In both, performance problems usually trace back to app code: unmemoized lists, heavy work on the UI thread, oversized images. Profile with Flutter DevTools or React Native's performance tooling before switching frameworks.
Payments, maps, Bluetooth, health data and camera work all need native code at some point. React Native's Expo modules and community packages cover common needs, and writing a Turbo Module in Swift or Kotlin is routine for experienced teams. Flutter plugins cover the same ground; platform channels and Dart FFI handle the rest. Either way, budget for engineers who can read and write Swift and Kotlin. A cross-platform team with no native skills stalls the first time a vendor SDK ships iOS and Android only.
Flutter apps include the engine, so baseline binary size is larger than a minimal native app. React Native apps include the JavaScript engine (Hermes by default) and bundle. For most products this is not decisive, but check if you target markets with low-storage devices.
React Native benefits from the huge React and TypeScript pool: many web engineers can contribute on day one, though senior mobile experience (store releases, native modules, crash triage) is rarer. Flutter's pool is smaller but focused, and its engineers are usually mobile specialists. Screen either way for shipped apps, native integration work and release management. Our Flutter interview questions help with the Dart side.
Ryz Labs puts senior mobile engineers from Latin America on your team, working US business hours with same-day code review. Only the top 1% of the tens of thousands of engineers we interview make it, and Fortune 500 engineering teams rely on us. Our Flutter developers and React Native developers ship store releases, native modules and custom UI, and can pair with our iOS developers when Swift work comes up. For a scoped app build, see mobile app development.
Typical cost is $7,000 to $15,000 per engineer per month by seniority; a quote gives you the plan, the price and the people before you start.
Neither is universally better. React Native is the stronger choice for teams that already write React and want native UI components and over-the-air updates. Flutter is stronger for custom, pixel-consistent UI and for reaching desktop and embedded screens from one toolkit.
For most business apps, users cannot tell the difference. Flutter offers very consistent rendering because it draws its own UI. React Native's New Architecture removed the old bridge bottleneck. App code quality matters more than framework choice.
With React Native, yes: business logic, API clients, types and validation can be shared, and React Native Web can share some UI. With Flutter, sharing with an existing React web app is limited to API contracts.
You need native skills on the team for SDK integrations, platform-specific bugs and store release issues, even if most code is cross-platform. Many teams cover this with one or two engineers who know Swift and Kotlin well.
We scope your team with you, then share a plan, a price and the names of the people before anyone starts. Timing depends on the roles and seniority you need, so talk to us about your app.
Questions we didn't answer? Email info@ryzlabs.com.
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