Can you migrate our app without downtime?

Yes. For large apps, we use a phased approach where Flutter screens replace legacy screens one at a time. For smaller apps, a complete rewrite can ship in weeks. Either way, your app stays in the App Store throughout.

How long does a migration take?

Depends on the source platform and app complexity. A focused app can be migrated in 6-12 weeks. A large enterprise app with many integrations takes 3-6 months. We scope after a free discovery call.

Do you migrate the backend too?

We focus on the mobile frontend. If your backend needs modernization, we can recommend partners or handle API layer changes that support the new Flutter client.

What about our existing data and users?

We plan the migration to preserve all user data, accounts, and settings. Users update the app and keep using it seamlessly.

What if we're not sure migration is the right choice?

Start with a technical audit. We'll assess your current app, estimate migration effort, and tell you honestly whether migration makes sense or if improving the existing codebase is better.

Legacy Migration

Modernize Your
App Stack

We migrate apps from React Native, Xamarin, native iOS/Android, and legacy platforms to Flutter. Summit Registration Services shipped a complete Flutter rebuild in six weeks while their existing app stayed live.

For large apps, we migrate screen by screen with your existing app running in production. For smaller, focused apps, a full rewrite can ship faster. We match the approach to the project.

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Migration Track Record

6 Weeks to ship a full Flutter rebuild of Summit Registration Services' legacy event scanning app.

0 Features lost in Summit Registration Services' migration from legacy to Flutter.

0 Days of downtime during migration. Your app stays live throughout.

2 Platforms from one codebase after migration. iOS and Android, always in sync.

What We Migrate

React Native to Flutter

Move from JavaScript bridges and native module headaches to compiled Dart. Better performance, single rendering engine, and a unified widget system.

Xamarin & .NET MAUI to Flutter

Escape the shrinking Xamarin ecosystem. Flutter's active community, Google backing, and mature tooling provide a stable foundation for the next decade.

PowerApps & Oracle WebForms

Replace low-code limitations with a real engineering platform. Full control over UI, performance, and integrations without vendor lock-in.

Native iOS/Android Consolidation

Merge separate iOS and Android codebases into one Flutter app. Cut maintenance in half, ship features to both platforms simultaneously.

Migration Projects

Summit Registration Services

SUMMIT

mobile-appflutter

See all case studies

Why Migrate to Flutter?

End the Dual Maintenance

Two codebases means two bug lists, two feature backlogs, two teams. Flutter gives you one codebase for iOS and Android that compiles to native ARM code.

Future-Proof Your Stack

Flutter supports mobile, web, desktop, and embedded from one codebase. As your product grows, your app grows with it without starting over.

Keep Your Users

Whether we migrate in phases or do a full rewrite, your existing app stays live until the new one is ready. No gap in service, no lost data.

Insights

Flutter vs React Native: How We Choose (and Why We Picked Flutter)

A practical comparison of Flutter and React Native from a team that ships production apps. What actually matters when choosing a cross-platform framework.

How We Integrated Shimano DI2 into a Flutter BLE Companion App

Classified Cycling joined the Shimano Connected Partners program. We built the mobile-side D-Fly protocol integration that lets riders pair their DI2 shifters with the Classified Powershift Hub through the app.

Vistar // Powershift: Integrating TRP's CMD Protocol in the Classified App

When TRP and Classified launched the Vistar // Powershift groupset, we built the mobile-side integration that connects TRP's CMD wireless shifters with the Classified Powershift Hub through the companion app.

Frequently Asked Questions

: Yes. For large apps, we use a phased approach where Flutter screens replace legacy screens one at a time. For smaller apps, a complete rewrite can ship in weeks. Either way, your app stays in the App Store throughout.
: Depends on the source platform and app complexity. A focused app can be migrated in 6-12 weeks. A large enterprise app with many integrations takes 3-6 months. We scope after a free discovery call.
: We focus on the mobile frontend. If your backend needs modernization, we can recommend partners or handle API layer changes that support the new Flutter client.
: We plan the migration to preserve all user data, accounts, and settings. Users update the app and keep using it seamlessly.
: React Native, Xamarin, native iOS/Android, and legacy platforms. Summit Registration Services shipped a complete Flutter rebuild in six weeks while their existing app stayed live.
: Start with a technical audit. We'll assess your current app, estimate migration effort, and tell you honestly whether migration makes sense or if improving the existing codebase is better.

Ready to modernize your app?

Book a free 30-minute discovery call. We'll assess your current platform and map out a migration path. No strings attached.

Free, no obligation 30 minutes With a senior consultant