Flutter Agency

FLUTTERONECODEBASE

With Flutter we build apps with consistent UI and fast iteration – ideal when native speed and budget timing must come together.

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We areFlutterbuilders

We combine widget composition, state management and platform channels for real product requirements.

Architecture: Riverpod/BLoC/Cubit depending on team size
Navigation, deep links and push strategies
Build pipelines, flavors and store releases
Integration with APIs, auth and analytics

Rendering & 60fps target

Skia-based rendering reduces bridge overhead; animations stay smooth as long as state updates remain disciplined.

Single codebase – real savings

Shared business logic and UI building blocks reduce bug surface area and onboarding for new developers.

Platform APIs & plugins

Camera, biometrics, storage: where needed, we encapsulate native capabilities cleanly and version contracts.

Tests & quality

Widget, integration and golden tests increase confidence in UI regressions – especially for white-label apps.

Selected references

Toggo App

KIDS ENTERTAINMENT

App
Ionic
Angular

BVB Kids App

HEJA BVB – FÜR KIDS

App
Ionic

KUMHO Tire Europe App

MARKETING-APP FÜR EINE STARKE MARKE

App
React Native
iOS
Android
PWA

Vosdellen App

SCHADENSMELDUNG APPLIKATION

App
iOS
Android

Services &solutions

From MVP to enterprise app: we deliver architecture, UI implementation and operations manual.

Greenfield apps and gradual migration from RN/WebViews
Design system implementation in Flutter Widgets
Backend integration including offline queues
CI/CD, Crashlytics and performance profiling

B2B apps & field force

Synchronised data, robust forms and signatures: Flutter scales equally on tablets and phones.

Companion apps to commerce

Order status, loyalty and push offers benefit from shared API clients with your web stack.

Why nextlevels

Your edge with Flutter

Cross-platform without compromise on maintenance cost: we rely on testable modules and clear UX guardrails.

Faster release cycles compared to dual-native
Consistent design across platforms
Experience with complex forms and offline scenarios
Guidance through app store processes

Related services

Ready for your Flutter project?

Let's talk about your requirements – we'll get back to you within 24 hours with concrete next steps.

Paul Kalisch
Executive Partner

info@nextlevels.de +49 (0) 2161 539 71 60

Technology Data & Insights

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Frequently asked questions about Flutter

When is Flutter the right choice for our project?

Flutter shines when you want to serve iOS and Android from one shared codebase and need native performance paired with a tight budget and timeline. Because UI and logic are shared, you avoid running two separate native teams and get a consistent appearance on both platforms. When it makes sense, we can also ship a web build from the same codebase.

How do you approach a Flutter app architecturally?

We build the interface from composable widgets and pick the state-management approach to match your team size: Riverpod, BLoC or Cubit. For platform-specific features that Flutter doesn't cover directly, we use platform channels and write the necessary native code in Swift or Kotlin. That keeps the shared code maintainable without giving up real device capabilities.

How do you integrate Flutter with our existing systems?

We connect your REST or GraphQL APIs, handle authentication cleanly and add offline queues where needed so the app stays usable without a stable connection. For analytics, deep links and push strategies we set up the required integrations. Platform channels also let us plug existing native modules or SDKs straight in.

Can we migrate an existing app to Flutter step by step?

Yes. Alongside greenfield apps we also do gradual migrations from React Native or WebView-based solutions. Flutter can be introduced module by module, so you don't have to rebuild everything at once. We plan the transition so the app stays shippable throughout and the risk stays manageable.

When is Flutter not the right fit?

If your app leans heavily on platform-specific native APIs or a mature native SDK that only exists as an iOS or Android library, pure native development can be the better fit. For extremely lightweight apps or web-only projects there are often more direct paths too. We'll tell you honestly when a different approach suits your case better instead of pushing Flutter at all costs.