Key takeaways
- Both build real iOS and Android apps from one codebase. For most business apps, users will not be able to tell which one you used.
- Flutter draws every pixel itself, so the app looks the same everywhere. React Native uses each platform’s own native views.
- If your team or web product already runs on React, React Native lets you share people and code. If you are starting fresh with a brand-led design, Flutter fits well.
- Performance decides it only for heavy device work: real-time camera or audio, 3D, very large data on the phone. Prove that one feature before you commit.
- The yearly upkeep depends more on how many outside packages the app uses than on the framework. Keep the list short and the versions current.
Founders asking “Flutter or React Native?” usually mean something else: which one will I not regret in two years? Raw speed rarely settles that. What settles it is who will maintain the app, what it has to share with your web product, and how much of it depends on the phone itself. This guide compares the two on the points that decide that, gives a short guide by kind of app, clears up the performance myths, and says when you should skip both and build natively.
What is the difference between Flutter and React Native?
Flutter draws its whole interface itself, with its own widgets and rendering engine; React Native turns your components into each platform’s own native views. Everything else follows from that one difference.
- Flutter is Google’s open-source framework. You write the app in Dart. In the words of Flutter’s own architecture overview, interfaces “are built, laid out, composited, and painted by Flutter itself”, instead of being translated into the operating system’s widgets. Since Flutter 3.27, its renderer, Impeller, is the default on iOS and on Android API 29 and later.
- React Native is Meta’s open-source framework. You write the app in JavaScript or TypeScript with React. As the React Native docs put it, “at runtime, React Native creates the corresponding Android and iOS views for those components.” Its rebuilt core, the New Architecture, replaced the old asynchronous bridge between JavaScript and native code, and since version 0.82 it is the only architecture React Native runs on.
The practical consequence: a Flutter app looks the same on every phone unless you tell it otherwise, and a React Native app picks up each platform’s own controls and behaviour. Neither is better. One gives you control of every pixel; the other gives you the platform’s look for free.
Still weighing the two?
Tell us what the app must do and who will maintain it, and we’ll talk through which framework fits.
Which one fits your kind of app?
The kind of app narrows the choice quickly. The types below are the ones buyers most often bring to the question, each with the way it usually leans and the thing to check before you commit.
If your app fits two types, the people decide it. Look at who will work on the app after launch, your own engineers or the team you will hire, and pick the framework they can keep improving without a rewrite.
Does performance still decide it?
For most business apps, no: both frameworks scroll lists, play media, show maps and take payments smoothly on current phones, and the difference users notice comes from how the app is built, not which framework built it. The arguments you will read online are often about versions of each framework that no longer ship.
Performance does decide it in a narrow set of apps: heavy real-time camera or audio processing, complex 3D or games, and apps that hold very large amounts of data on the phone. If one of those is the core of your product, build a small proof of that one feature in your chosen framework, test it on a low-cost Android phone as well as a new iPhone, and decide from what you measure.
Will it be hard to hire for later?
It shouldn’t be, but the two pools differ. React Native draws on the large pool of engineers who already write JavaScript and React for the web, so you can often find someone who knows the language on day one. Dart is used mainly with Flutter, so fewer engineers arrive already knowing it, although engineers who know Java, Kotlin, Swift or C# tend to pick Dart up quickly.
Two cautions apply to both:
- Knowing the language is not knowing mobile. The scarce skills are the mobile ones in either framework: store releases, signing, push notifications, offline data, native modules and debugging on real devices. Ask a candidate about their last app release, not about the framework.
- The codebase matters more than the framework. A clean, documented, tested app in either framework is easy to hand to a new engineer. A rushed one is hard in both. The handover you ask for at the end of the project counts for more than the framework choice.
What does each cost to maintain?
Both cost money every year after launch, because Apple and Google change their platforms every year, and the framework and its packages have to keep up. Over time, the cost is driven less by the framework than by how many outside packages the app depends on and how far behind its versions are allowed to fall.
The difference between the two is in what moves. A Flutter upgrade is mostly one SDK, with the renderer and most widgets inside it. A React Native upgrade moves more parts at once: React Native itself, the native libraries the app uses and, often, the Expo tooling that React Native’s own docs recommend for new apps. React Native’s move to the New Architecture shows why that matters: a library that never added support for it can block an app from upgrading until it is replaced.
When does native still win?
Native still wins when the app’s most important features live in the phone itself rather than on its screens: heavy, continuous use of the camera, sensors, Bluetooth or background processing, or a product built around one platform’s newest features on the day they launch. In those apps, a cross-platform framework adds a layer between your code and the part that matters most.
Native means writing the iOS app in Swift and the Android app in Kotlin: two codebases, usually two sets of skills, and every feature built twice. That is a real cost, so it pays only when the device work is the product. A middle path is common: build the app in Flutter or React Native and write the one demanding feature as a native module. Use the checklist below to see where your app sits.
If you score in the middle, prove the hardest feature first. A short spike on that one feature, in the framework you lean towards, will tell you more than any comparison.
How do you choose?
Choose by your team first, your product second and performance last. If your company already writes React, React Native lets the same people and the same code reach the phone. If you are starting fresh and the interface is your brand, Flutter gives you one design that holds on every phone. If the device itself is the product, consider native.
We build with both Flutter and React Native, so the recommendation can follow your product rather than our habits. To see how we approach each one, read our pages on Flutter app development and React Native development, or step back to the wider choice in native, hybrid or cross-platform.