Flutter (Dart) draws its own interface with its Impeller engine, so the app looks identical on every platform, and it also targets web and desktop. React Native (JavaScript) renders with each platform's native components. Both build iOS and Android from one codebase. Choose by your team's language, your design approach and the native features you need.
Why cross-platform at all
Two native apps mean two codebases in two languages, built, tested and maintained twice. Clutch's app cost guide (updated 21 September 2026) notes that maintaining and updating two native apps raises long-term cost. Flutter and React Native both let one team write most of the app once for iOS and Android, which lowers build and upkeep time for most business apps.
Language
Flutter's FAQ says the framework is written in Dart, with its engine in C and C++; apps are written in Dart. React Native's home page describes it as written in JavaScript and rendered with native code; apps are written in JavaScript, commonly with TypeScript. A team that already writes React for the web will find React Native familiar; Dart is a separate language to learn.
How each draws the screen
Flutter draws every part of the interface itself. Its FAQ says it renders with its own high-performance engine, Impeller, using Metal on iOS and Vulkan on Android. The app looks the same on every device, which suits custom, brand-led designs.
React Native uses the platform's own interface. Its home page says components such as View, Text and Image map directly to the platform's native UI building blocks, so buttons and lists look and behave like those in other apps on the same phone. Since version 0.76, released in October 2024, React Native's New Architecture is enabled by default.
Platforms
Flutter's FAQ lists mobile (iOS and Android), web, desktop (macOS, Windows and Linux) and embedded devices as targets, so one codebase can reach well beyond phones. React Native centers on iOS and Android. If a desktop or web version from the same code matters, that points toward Flutter.
Performance and native features
For most business apps, forms, lists, maps, payments and media, both frameworks perform well when built carefully. Heavy animation and custom graphics favor Flutter's own rendering; deep use of platform-specific features may need native modules in either framework, written in Swift or Kotlin. List the native features your app needs (camera, Bluetooth, background location, payments, health data) and check each framework's support before you choose.
Team and hiring
The framework your team can staff and maintain matters more than benchmarks. React Native draws on JavaScript and React skills; Flutter needs developers who know Dart. If you will hire, look at who you can retain for years, since the app will need updates every year. Our Flutter developers and React Native developers can be retained for either route.
Which to choose
A short rule of thumb, from our own working practice:
- Choose Flutter for a custom, brand-led design that looks identical on every phone, heavy animation, or one codebase that also covers web or desktop.
- Choose React Native when your team already works in JavaScript or React, you want platform-native look and behavior, or you share logic with a React web app.
- Choose native (Swift and Kotlin) when the app depends on platform features at their deepest, or performance is the product.
Conclusion
Flutter and React Native both build iOS and Android apps from one codebase. Flutter, written in Dart, draws its own interface with the Impeller engine and also reaches web, desktop and embedded; React Native, written in JavaScript, renders with native components and has run its New Architecture by default since version 0.76. Choose by your team's skills, your design approach and the native features the app needs.
PromotEdge International is an international strategy, technology, marketing and design company, and our delivery team is in India. Our mobile app development team builds in Flutter or React Native, in your own store accounts, and recommends one in writing after seeing the app.
Facts we rely on: see our company facts for what we state about ourselves and where each fact comes from.