Bring your iOS and Android apps into a shared Flutter codebase with a clear plan for the people already using them. We assess your current apps, rebuild agreed workflows and test the path from the native release to Flutter.
Existing accounts, saved data and native integrations are part of the migration scope.
Nautilus Techlabs helps teams migrate native iOS and Android applications to Flutter. The service covers codebase assessment, migration planning, interface development, native integrations, user-data continuity and testing upgrades from the current app.
Screens and application logic that move to Flutter are implemented in Dart. Compatible APIs and native components can remain in use. We assess whether shared development will help your roadmap and what the transition would cost before recommending a phased migration or rebuild.
The scope includes the visible experience, the services behind it and the transition for current installations.
Review your Swift, Objective-C, Kotlin or Java apps before choosing a migration approach. Map the features users depend on, technical dependencies and the work that can be retained.
Rebuild agreed screens and workflows in Flutter with a shared Dart codebase. Preserve familiar journeys or make deliberate design changes that your team can review.
Plan how current users move to the new version. Review accounts, authentication, local storage and purchase entitlements before testing upgrades with representative app states.
Assess plugins and native bridges for the features your app already uses. Keep platform-specific code where needed and test behavior on the devices you support.
Reuse compatible backend services while adapting the client application. Coordinate changes so older installed versions and the new Flutter release can coexist during rollout.
Test the transition from the published native app, alongside fresh installs. Prepare releases through your existing store records and monitor the agreed rollout.
Your release commitments, native dependencies and product roadmap determine the approach. We review both the implementation effort and the cost of maintaining the app through the transition.
Introduce Flutter into selected parts of an existing native app while retaining other screens. This can suit products that need to keep shipping during migration, provided navigation, plugins and shared state work across the boundary.
Build the agreed experience in Flutter, then release it as an update once feature parity and upgrade paths are ready. This can suit a defined feature set or a broader product redesign.
Migration is a product and engineering decision. If the native apps already meet your needs, or a critical integration makes the transition impractical, we can recommend targeted improvements to the current codebase.
Resolve the migration risks early, review working builds and agree release criteria around the behavior your users rely on.
Review the repositories, store setup, APIs, device features and data storage. Identify migration risks and confirm which user journeys must remain intact.
Prove important native integrations and data-access paths in a small technical spike. Agree the Flutter architecture, migration sequence and release criteria.
Build the agreed workflows, connect existing services and implement data migrations. Compare behavior with the native apps and test on the supported device set.
Submit through your store accounts, monitor the release and address migration issues. Document build, deployment and maintenance responsibilities for your team.
Yes, a Flutter version can be delivered as an update to the existing app when store identity and signing requirements are met. Account and data continuity need their own implementation and upgrade tests.
Verify the iOS bundle identifier, Android application ID, signing setup and developer-account access. Check versioning and device support so the new release can reach the intended existing installations.
Install the current native version, create representative data and then upgrade. Check authentication, stored records, preferences and purchase access instead of relying only on fresh-install tests.
Check notifications, deep links, payments and hardware features across the agreed device set. Measure important performance targets and review intentional design changes with your team.
Keep API compatibility in view while users update at different times. Monitor crashes and migration errors, define when to pause further rollout and prepare a corrective release if needed. An installed app update cannot be assumed to roll back automatically.
Scope and timing depend on the existing apps, feature parity, data formats and native integrations. We assess the difficult dependencies before recommending milestones and a budget.
Request a Migration AssessmentChoose an assessment, a scoped migration or ongoing engineering support based on your product needs. Compare engagement options. For a new product, explore our Flutter app development service.
It means rebuilding agreed native iOS and Android screens and application logic in Flutter and Dart. We assess the existing apps, retain compatible backends and native integrations, migrate stored data where needed and test the new version. It is a planned engineering project, not an automatic code conversion.
Yes. We can plan the Flutter release as an update to the existing app, so users do not need a separate app or new account. We verify store identity, signing, account access and saved-data migration. Any required sign-in steps or changes to supported devices are identified before rollout.
They can, with explicit migration work. We review backend identities, purchase validation, authentication and local storage, then test upgrades from representative native installations. Moving to Flutter does not automatically preserve access to every storage format, session or purchase entitlement.
We plan releases through the existing store records using the required app identifiers and signing setup. This keeps the migration associated with the current listings rather than launching a separate app. We verify developer-account access and submission requirements during the assessment.
Yes, where the app architecture and dependencies support it. Flutter add-to-app lets us introduce Flutter screens inside a native application. We assess navigation, shared state and plugin compatibility, then agree which features to move first and how both codebases will be maintained.
Often, yes. We assess existing Flutter plugins and the option to bridge to native code for required SDKs. Features such as Bluetooth, background tasks, payments and biometrics need platform-specific validation on your target devices before their behavior can be confirmed.
Usually not when the current backend and API contracts can support the Flutter client. We review authentication, payloads, permissions and synchronization. Any necessary server changes are planned to support older installed app versions during the transition.
The estimate depends on feature scope, code quality, native SDKs, stored data, design changes and release requirements. We audit the current apps and assess the highest-risk integrations before proposing milestones and a budget. A phased migration and a full rebuild have different delivery tradeoffs.
A migration does not automatically improve performance. We agree targets for important journeys, startup, scrolling and resource use, then measure on representative devices. The result depends on the implementation, integrations and workload as well as the framework.
You own 100% of the custom project source code and intellectual property. We hand over the repository, build configuration and documentation. Ongoing Flutter upgrades, issue resolution and feature work can be agreed around your product roadmap.
Share your existing apps and migration goals. We’ll help identify what can be retained, what needs rebuilding and how to plan the transition for your users.
