Every comparison of these two is a feature table, and feature tables are useless here because both frameworks can build your app. They have both been used to ship software with more users than you will have. The decision is not about capability.
It comes down to two questions, and once you answer them honestly there is usually not much left to argue about.
Question one: what is the existing front end written in?
If your app came out of Lovable, Bolt, v0, or most Base44 projects, it is React and TypeScript. That matters more than any framework benchmark, because a React Native move brings across your API client, your types, your validation, your permission logic, your formatting and your state management essentially unchanged.
What gets rewritten is presentation - every component's rendering, and the navigation. Which you were going to redo anyway, because a layout designed for a 1440-pixel browser window is not a layout for a phone.
| Layer | React web → React Native | React web → Flutter |
|---|---|---|
| API client and types | Moves as-is | Rewritten in Dart |
| Validation and business rules | Moves as-is | Rewritten in Dart |
| State management | Mostly moves | Rewritten |
| Component rendering | Rewritten | Rewritten |
| Navigation | Rewritten | Rewritten |
| Design system | Re-expressed, same tokens | Re-expressed, same tokens |
Two rows differ, and they are the two rows that contain the business. Choosing Flutter over an existing React codebase means paying to rewrite logic that already works and is already tested. Sometimes that is worth it. It is never free, and it should be a decision rather than an assumption.
Question two: who maintains this in two years?
Not who builds it - who fixes a production bug at nine in the evening eighteen months from now. This question decides more projects than the first one and it gets asked least.
- If your team writes JavaScript and you hire from a JavaScript market, React Native means the same people can work on the mobile app. That is a real, ongoing saving.
- If your team already writes Dart, or your market has Flutter developers and few React Native ones, that outweighs the code-reuse argument.
- If the honest answer is "nobody yet", pick the one you can hire for in your city or your timezone, and accept that this is the deciding input.
When Flutter genuinely wins
We recommend it roughly a third of the time, for specific reasons rather than general ones:
- The interface is the product. Custom drawing, complex gesture handling, heavy animation. Flutter paints every pixel itself, which makes this materially less painful.
- Pixel-identical rendering across platforms is a requirement - brand-critical UI, or a regulated context where the two platforms must not differ.
- There is no existing React front end, so the code-reuse argument does not apply at all.
- The team already writes Dart, in which case this whole article is moot.
- You want desktop from the same codebase and the desktop app is a real requirement rather than a maybe.
The things that do not decide it
| Argument | Why it does not settle anything |
|---|---|
| "Flutter is faster" | Both are fast enough for any app either of them would be chosen for. Your bottleneck will be the network and the database. |
| "React Native has the New Architecture now" | True and it closed the gap that used to matter. It is a reason not to rule React Native out, not a reason to choose it. |
| "Flutter apps are bigger" | A few megabytes. Nobody has ever declined to install an app over this. |
| "React Native breaks on upgrades" | Much less true than it was, and Expo's managed workflow handles most of it. Both frameworks require maintenance. |
| "X is what big company Y uses" | Big company Y has a mobile platform team. You have a founder and a contractor. |
The third option nobody offers
Neither. A progressive web app is installable, works offline, and does push on Android - days of work rather than months. On iOS the support is narrower, particularly for push, and that is very often the real reason a product needs a native app. Worth knowing that is the reason.
Between the two extremes sits a native shell around your existing web app with real native plugins added - push, camera, biometrics, offline storage. Weeks rather than months, and it clears App Store review provided the native additions are genuine rather than cosmetic.
The short version
React codebase and a JavaScript team: rebuild it in React Native, and most of your non-visual code comes with you. Custom animation-led interface, or a Dart team, or no existing front end: Flutter is a real contender. Nobody to maintain either: fix that before you pick a framework, because it is the question that actually decides whether the app exists in two years.
Written by Kato Chojiro
Takes AI-built MVPs to production: security, data, and the infrastructure underneath.
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