What a Flutter Migration Actually Is
If you're still weighing Flutter against React Native, read Flutter vs React Native in 2026 first — this page assumes you've already decided and answers the execution question instead: how, how long, how much, and how risky.
A React Native to Flutter migration is a rewrite, not a port. Flutter and React Native share no build artifacts, no component library, and no state layer — every screen, navigation flow, and native integration is rebuilt from scratch in Dart. What survives the move is everything that isn't code: your business rules, your API contracts, your data models, and the design decisions your team already made. Those become the specification the new app is built against, which is why a migration is faster and lower-risk than starting from a blank page — but it is still, honestly, a full rebuild of the client.
Who Should Migrate — and Who Shouldn't
Flutter is usually the right call for a team already running React Native or native in production — but not always, and we'd rather tell you that up front than sell you a rewrite you don't need.
Signs it's time to migrate
- React Native's upgrade treadmill (New Architecture, breaking releases, dependency churn) is costing real engineering time every cycle
- You're hitting a performance ceiling — jank on complex screens, slow list rendering, animation stutter — that the bridge architecture can't fix
- Native modules have become a maintenance burden: forked packages, version-locked dependencies, code the original author left behind
- Hiring is hard or inconsistent, and you want one team on one codebase instead of RN and native specialists
- You're already building new work in Flutter and want the rest of the app to match
When migration is NOT the right call
- Your app is stable, performs well, and isn't blocking the roadmap
- Your team is happy and productive, with no appetite for a multi-month rebuild
- You've invested heavily in custom native modules that work fine and have no Flutter equivalent worth chasing
- The case for migrating is "Flutter looks nice" rather than a real cost, performance, or maintenance problem
The honest read: if none of the "signs" above describe your app, don't migrate. A stable app with a happy team is the best app to leave alone. Tell us where you're actually stuck and we'll say plainly whether a migration is worth it — including "not yet."
The Incremental Approach: Add-to-App
The reason to migrate with us instead of commissioning a from-scratch rewrite is the delivery model, not the framework choice. We embed Flutter into your existing React Native or native app as a module — an add-to-app integration — and move screens across one at a time behind a shared router. Nothing about this requires a big-bang cutover, and nothing about it takes your app offline.
The Add-to-App Flow
Existing Shell Stays
Your current RN or native app keeps running in production, unchanged, as the host shell
Flutter Module Embedded
A Flutter engine is added to the shell via add-to-app, sharing navigation and native services
Screens Migrate One at a Time
Each screen ships in Flutter behind the router, tested and released independently
RN Screens Retire
As each Flutter screen proves out in production, its RN equivalent is deleted, not archived
Full Cutover
Once every screen has moved, the host shell itself is removed and the app is 100% Flutter
This isn't friction-free. For the length of the migration you're running two toolchains and two state layers side by side — and, until the design system is fully ported, two visual languages in different corners of the same app. That's temporarily more complexity, not less. We scope the migration map up front specifically to keep that window as short as it can be, but we won't pretend it disappears.
What Carries Over vs What's Rebuilt
Not everything is thrown away. Here's what actually survives the move to Flutter, and what gets rebuilt from zero.
| Layer | Carries Over | Rebuilt in Flutter |
|---|---|---|
| Business logic & rules | Yes | — |
| API contracts | Yes | — |
| Data models | Yes | — |
| Design tokens & brand system | Yes | — |
| Test cases (as specs) | Yes | — |
| UI screens | — | Rebuilt |
| Navigation | — | Rebuilt |
| State management | — | Rebuilt |
| Native integrations | — | Rebuilt |
| CI/CD pipeline | — | Rebuilt |
How We Run a Migration
1. Audit
We review your codebase — screens, navigation, state management, native modules, API surface, and test coverage — and flag what's straightforward to migrate versus what's going to be genuinely hard. Every landmine — a forked native module, an undocumented state machine, a backend contract nobody wrote down — gets found here, not three sprints into the rebuild.
2. Migration Map
The audit becomes a screen-by-screen migration plan: sequencing, dependencies between screens, which native modules need Flutter equivalents, and a realistic order that keeps the app shippable at every step. This document is what the rest of the project is scoped against.
3. Incremental Delivery
We embed Flutter into your existing shell and start shipping screens in priority order — usually starting with something low-risk to prove the pipeline, then moving into the screens that actually matter. Your app keeps releasing normally throughout; the migration runs alongside your regular roadmap, not instead of it.
4. Cutover
Once every screen has moved and the old code has been deleted, we retire the host shell and ship a Flutter-only build. From here the app is maintained like any other Flutter codebase — one team, one toolchain.
Prefer to keep the work in-house? Our Team Augmentation engineers can embed with your team and run the migration under your ownership instead of ours.
De-Risk Before You Commit
You don't have to commit to a full migration to find out what one would involve. Our AI Code Audit service runs the audit phase above as a fixed-scope engagement on its own: a full review of your existing codebase and a written report that becomes your migration map — landmines, native-module risk, and a realistic sequencing — whether or not you move forward with us afterward.
Start Here If You're Not Sure
An audit is the lowest-commitment way to find out whether a migration makes sense for your app, what it will actually cost, and where the real risk is — before anyone writes a line of Dart.
Timeline & Cost
A Flutter migration scales like a rebuild, because it is one — the codebase you end up with is a full Flutter app, built to the same scope as if you'd started from scratch. What the incremental approach changes is risk, not size: spreading delivery across screens stretches the calendar compared to a big-bang rewrite, but it means your app never goes dark, and you can stop, pause, or reprioritize at any screen boundary.
We don't quote migration timelines or prices without seeing the app — the range is too wide to be useful otherwise. For a sense of scale, see how we estimate how long a Flutter app takes to build and what actually drives Flutter development cost; a migration of a similarly-scoped app tracks close to those numbers, plus the audit and migration-map phase up front.
Frequently Asked Questions
Everything you need to know about migrating from React Native or native to Flutter