Audit and migration plan
An inventory of screens, native SDKs, data and release process, and an order that moves the least risky parts first.
Native → Flutter migration
Two native apps, one Flutter codebase — no big-bang rewrite.
We move iOS and Android apps to Flutter step by step: Flutter screens inside your native apps first, native SDKs kept where they earn their place, releases that never stop. Led by a founder with 16 years of native iOS and 5+ of Flutter, with AI doing the repetitive porting.
One module at a timethe app keeps shipping
- TodaySwift / Objective-C + Kotlin / Java
- Step by stepFlutter modules inside the native apps
- Native where it paysplugins · platform channels
- Resultone Dart codebase · iOS · Android · web
What we migrate
The whole app, in an order that keeps it live.
Add-to-app, screen by screen
Flutter modules embedded in your existing iOS and Android apps, so users keep getting updates — no months-long feature freeze.
Native SDKs, kept and wrapped
Payments, VoIP, maps, Bluetooth or in-house SDKs wrapped as Flutter plugins, like our open-source portsip plugin with CallKit and ConnectionService.
Web and backend, if you want
The same Dart code can power a web app too, and Serverpod brings Dart to the server.
AI-native migration
AI does the porting. Engineers own the result.
Much of a migration is translation: the same screen and the same logic in a new language. That is where AI is fastest, and where review matters most.
AI ports, seniors review
Claude drafts the Dart version of each screen from the native code. A senior engineer reviews every change before it is merged.
Side-by-side testing
Old and new screens are compared on real devices before a module goes live.
Tests carried over
Behavior is covered by unit, widget and integration tests, so regressions show up in CI, not in store reviews.
No release freeze
Native and Flutter code ship together during the migration; users keep getting updates.
Platform feel kept
Platform conventions on iOS and Android, with accessibility and dark mode checked screen by screen.
Your team included
We work alongside your developers, so they own the Flutter codebase when we are done.
How we migrate
Module by module, never offline.
Each step ends with a release your users can install. The native code is switched off only after its Flutter replacement has proven itself.
- 01 · Audit
Map both apps
Screens, native SDKs, data, analytics and release pipeline, written down.
- 02 · Plan
Order the modules
Least risky first, with a strategy for navigation and shared state.
- 03 · Port
Rebuild in Flutter
AI drafts the port, engineers review it, weekly builds on TestFlight and Internal Testing.
- 04 · Verify
Side by side on devices
Old and new compared on real phones, tests green, then the module ships.
- 05 · Retire
Switch off native code
Native screens removed once replaced. One codebase left to maintain.
Is it worth it?
Two native apps or one Flutter codebase.
| Two native apps | One Flutter codebase | |
|---|---|---|
| Code | Swift and Kotlin, two of everything | One Dart codebase for iOS, Android and web |
| New features | Built and tested twice | Built once, tested on both platforms |
| Team | iOS and Android specialists | One Flutter team, native skills for plugins |
| Native APIs | Direct access | Through plugins and platform channels |
| Best when | The UI is deeply platform-specific | The same product ships on both platforms |
Proof
Flutter and native, both in production.
Table Online
One Flutter codebase for iOS, Android and web: the game, the admin panel and a Serverpod backend in Dart.
See Table Online →portsip: a native SDK in Flutter
A native VoIP SDK wrapped as a Flutter plugin: SIP calls, CallKit on iOS, ConnectionService on Android. Open source.
portsip on pub.dev →How we review AI-written code
Features built on iOS, ported by an agent to Android, tested side by side and reviewed by senior engineers.
Read the pipeline → FAQ
Native to Flutter, answered.
Do we have to rewrite everything at once?
No. With Flutter’s add-to-app, Flutter screens run inside your existing native apps, so the migration happens module by module while you keep releasing.
Will the Flutter app feel native?
Yes. Flutter renders its own UI at native speed, and we follow each platform’s conventions. Where a native view is the better choice — maps or video, for example — it can be embedded.
What happens to our native SDKs?
They stay. We wrap them as Flutter plugins over platform channels, the way we did for the PortSIP VoIP SDK.
How long does a migration take?
It depends on the number of screens and native integrations. After the audit you get a module-by-module plan with an estimate for every step.
Can our developers keep working on the app?
Yes. We work alongside them, and the native and Flutter code ship together until the migration is done.
Who owns the code?
You do. All code, tests and documentation belong to you and stay with you after the engagement ends.
Thinking about Flutter? Start with a migration audit.
Send us your store links. We come back with a module-by-module plan, a timeline and a cost.