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Flutter development – cross-platform apps for iOS and Android from a single codebase
250+ projects · 5.0 on Google · 100% in Germany

Flutter development: cross-platform apps for iOS and Android from one codebase

For mid-sized companies: native-feeling mobile apps, fast iteration and connection to your business APIs – delivery and project ownership from Germany (Leer/East Frisia), named contacts, no offshore guesswork.

  • 250+ delivered projects
  • 5.0 stars on Google
  • 100% engineering in Germany
Book a no-obligation strategy callMap your project in 2 minutes

Flutter – fast on two platforms

Flutter enables iOS and Android apps with shared UI logic in Dart – ideal for MVPs, internal tools and B2B apps with clear workflows.

We connect Flutter clients to your APIs, set up push, offline cache and store submission – Made in Germany with transferable source code.

Technology overview: Flutter Development – stack details on our technology page. See also MVP development and app development.

Our Flutter services

From MVP to production app with maintenance contract.

Cross-platform MVPs

Core features testable in 8–12 weeks – with analytics and feedback loops.

B2B & field service apps

Offline capability, barcode, GPS, roles – robust in the field.

API integration

REST/GraphQL to Laravel, Node, .NET – including auth and error handling.

Store & operations

App Store / Play Store process, Crashlytics, OTA updates where useful.

One codebase

iOS and Android in sync – less duplicate maintenance.

UI quality

Material/Cupertino and custom design systems.

Performance

Profiling and optimisation for older devices.

Backend-agnostic

Use existing APIs instead of rebuilding.

Flutter in practice

We structure apps with clear state management (e.g. Riverpod/Bloc), golden tests for critical UI and CI builds per PR.

  • Flavors for staging/prod
  • Secure storage for tokens
  • Deep links and push tested thoroughly
  • Accessibility from the start

Describe target users and must-have flows – we outline MVP scope and architecture.

Related services

Frequently asked questions

FAQ on Flutter development

Technology, costs and agency choice

Flutter or React Native – when does each stack make sense?
Flutter fits when you want a consistent UI on iOS and Android, care about performance, and do not already have a large React/Next.js team. React Native fits when web and mobile should share TypeScript types and API clients. We advise stack-neutral – see our Flutter vs React Native comparison. For many B2B MVPs, Flutter is the faster path to two stores without two native teams.
What does a Flutter app cost – and how transparent is the quote?
MVPs with a core workflow often start from around €20,000; larger B2B apps with roles, offline and integrations tend towards €40,000–100,000. A separate backend (Laravel, Node, .NET) applies if no API exists yet. We separate app, backend and operations in the quote. Use our app development cost calculator or book a strategy call for a scope sketch.
How long does Flutter development take until store launch?

A lean MVP with 5–8 core screens and API integration is often store-ready in 8–12 weeks – including testing on target devices and review prep. Medium B2B apps with offline, roles and integrations typically need 4–6 months. The main time factor is prioritisation and fast feedback loops with business and IT, not Dart itself. We work in two-week sprints with demos.

Do we need native modules or is pure Flutter enough?

Most B2B and MVP projects work with Flutter alone. We add native bridges only for BLE, special payment hardware, MDM requirements or store policy edge cases – documented and with a maintenance plan.

Operations, compliance and backend integration

Do you handle maintenance, OS updates and store submissions after launch?
Yes – with SLA for bugfixes, dependency upgrades (Flutter/Dart, plugins) and feature sprints on request. iOS and Android version jumps need regular updates. We support App Store and Play Store processes, Crashlytics and release tracks. See also software maintenance.
How do you connect Flutter to existing ERP, CRM or Laravel backends?
We use your REST or GraphQL APIs – auth (OAuth2, JWT), error handling, offline cache and retry logic in the client. If no API exists yet, we build the backend in parallel (e.g. Laravel, Node.js). Business logic stays on the server, not in the app.
GDPR, hosting and Made in Germany – what matters for Flutter projects?

Development and coordination run in Leer, Germany – no offshore subcontractors. Personal data flows only through documented APIs and hosting that match your DPA role. Push, analytics and crash tools are chosen GDPR-consciously. Made in Germany means a reachable contact, German contracts and transferable source code in your repository.

When is Flutter not the right choice?
Flutter is less ideal if you need only one platform and already have a strong Swift or Kotlin team, if the app needs extreme OS-only features without bridges, or if the product should live only as a browser PWA. We may recommend native development, React Native or web-only. Use our project check for a quick fit assessment.
Is Flutter suitable for B2B apps with offline and field service?

Yes – typical scenarios include field service with barcode/GPS, offline forms and roles (technician, dispatcher, admin). We plan sync strategies, conflict resolution and secure token storage from day one, including performance tests on older Android devices.

Outline your Flutter project

Request Flutter app

Describe target users and must-have flows – we outline MVP scope, architecture and a realistic timeline Made in Germany.

Request Flutter appContact

Flutter Development: structured project approach

Björn Groenewold

Up to 50% of your investment via BAFA/KfW

Use our funding calculator to see which government grants may apply to your project.

Björn Groenewold – Managing Director

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Flutter Development & Flutter Agency Germany | Groenewold IT Solutions