Flutter App Development
Cross-platform iOS and Android apps built from one Dart codebase, engineered for pixel-perfect UI and native-grade performance from day one.
Flutter Apps
One Codebase. Two Flawless Apps.
iOS and Android built together from a single Flutter codebase, so your brand looks and performs identically everywhere. Delivered by WebNX Global Services' full-stack team, building software since 2008.
- iOS + Android
- 18+ Years Experience
- US · UK · Canada · India
- 120fps Smooth
Why Flutter
Still paying to build the same app twice?
If any of this sounds familiar, one well-built Flutter codebase fixes it, without asking you to give up polish or speed on either platform.
06 problems we design out of every Flutter build
- 01
Building the same app twice
Separate iOS and Android teams mean writing every feature twice, testing twice and fixing the same bug twice. Flutter builds both from one Dart codebase, so your team ships once.
- 02
Two apps that no longer match
Native teams working apart drift visually over time. Flutter draws its own pixels, so the same interface renders identically on iOS and Android, release after release.
- 03
Cross-platform apps that lag
Most cross-platform tools feel like a compromise. Flutter compiles straight to native ARM code with its own rendering engine, holding 60 to 120fps on real devices.
- 04
Design changes that take days
Native builds turn every UI tweak into a rebuild-and-wait cycle. Flutter hot reload pushes changes to the screen in under a second, so design and build move together.
- 05
Custom UI priced like a luxury
Highly animated, brand-heavy interfaces cost double when built natively for two platforms. Flutter is built for exactly this kind of expressive UI, on both at once.
- 06
Boxed into mobile only
Most frameworks stop at phones. Flutter also reaches web and desktop from the same codebase, so a future web app does not mean a future rewrite.
Who we work with
Industries we build Flutter apps for
From fast-moving startups to regulated fintechs, we have shipped Flutter apps across sectors where polish and performance both matter. We learn your users before we design for them.
Startups & MVPs
Retail & Ecommerce
FinTech
Health & Fitness
Education
On-demand
Social
Travel
Enterprise
Real Estate
What we build
Our Flutter development services
From a fast, polished MVP to a multi-platform product suite, every Flutter build we ship is fast, on-brand and built on architecture that scales with you.
iOS + Android From One Codebase
One team, one codebase, two stores. Your app looks and behaves identically on iPhone and Android in every release.
Custom UI & Animation
Expressive, on-brand interfaces and fluid motion, rendered by Flutter's own engine so it looks identical on every device.
Flutter Web & Desktop
Extend the same Dart codebase to web and to Windows, macOS or Linux desktop the moment your product needs to be everywhere.
Native Platform Integration
Platform channels bridge to native code for camera, Bluetooth, biometrics, payments and anything a Flutter plugin does not already cover.
Backend & Firebase Integration
Firebase or a custom backend wired in cleanly for authentication, data, storage, push notifications and analytics.
State Management Architecture
Clean architecture built on Riverpod, Bloc or Provider, so the app stays maintainable as features and team size grow.
Performance Optimization
Profiling, widget rebuild tuning and animation optimization so the app holds a smooth frame rate on every supported device.
App Migration To Flutter
We consolidate separate native apps, or a struggling cross-platform build, into one clean, maintainable Flutter codebase without losing your users.
Testing & QA
Widget, integration and golden tests, backed by real-device testing on iOS and Android before anything reaches a store.
App Store & Play Submission
We build, sign and submit to both stores and manage each review, so launch day happens on both platforms together.
Maintenance & Upgrades
Ongoing Flutter and dependency upgrades, OS readiness checks and new features to keep the app current long after launch.
Why choose us
Flutter development done the right way
Flutter rewards good engineering with fast, beautiful apps. We build with clean architecture, real performance tuning and proper testing, then stay around to keep it current, the way we have for clients since 2008.
Start your project-
Flutter specialists, not generalists
We build production Flutter apps with clean architecture, not disposable prototypes, treating the framework as a core practice, not a side skill.
-
Pixel-perfect on both platforms
Flutter renders its own UI, so what your team designs is exactly what ships, identically, on both iOS and Android devices.
-
AI-driven speed, human-reviewed quality
AI-assisted prototyping and tooling get you to a working build faster, and every line still passes through experienced engineers before it ships.
-
One codebase, real cost savings
Both platforms shipped from a single Dart codebase cuts build and maintenance cost, without the compromises of a cheap wrapper framework.
-
Architecture built to scale
Proper state management and project structure keep the app maintainable as features, traffic and your team all grow over time.
-
Global delivery, real overlap
We work daily with clients across the US, UK, Canada and India, with support hours structured around your time zone, not just ours.
-
Tested on real devices
Widget and integration tests plus real-device QA on iOS and Android hardware, run before anything reaches either app store.
-
Support that doesn't stop at launch
Bug fixes, OS readiness checks and Flutter upgrades keep coming after handover, usually resolved before you have to chase us for them.
How we work
Our Flutter development process
Eight clear stages, each with something you can see and sign off on. No black box between idea and both app stores.
- 01
Discovery
We map your users, platforms and any custom UI or native features the app needs before writing a line of code.
- 02
Design
Branded, expressive UI designed and prototyped, reviewed and signed off by your team before build starts.
- 03
Architecture
State management, project structure, plugins and backend integrations planned up front, not improvised mid-build.
- 04
Development
One Flutter codebase built in reviewable sprints, with working builds for both platforms delivered weekly.
- 05
Testing
Widget, integration and golden tests, plus real-device QA on iOS and Android before anything ships.
- 06
Submission
We build, sign and submit to the App Store and Google Play, and manage each review end to end.
- 07
Optimize
Performance profiling and tuning so the app holds a smooth frame rate across every supported device.
- 08
Support
Flutter and dependency upgrades, monitoring and new features after launch, so the app keeps pace with both platforms.
What is included
A demo build is not a production Flutter app
The difference between a quick prototype and a maintainable, fast, fully tested app is everything below. Here is what comes standard on every Flutter project we deliver.
What you get Budget build WebNX
One Dart codebase for both platforms
Pixel-identical UI on iOS & Android
Custom animation & expressive UI
Native platform channel integration
Scalable state management architecture
Real-device testing on both platforms
Both store submissions handled for you
Basic responsive layout
Analytics & crash reporting
Ongoing Flutter upgrade maintenance
Client words
Trusted by teams that care about polish
Flutter let us launch a beautifully animated app on both stores in nine weeks on one budget. The UI is identical on iPhone and Android and runs at a silky frame rate. Our designers could not believe their work shipped pixel for pixel.
They consolidated our two native apps into one Flutter codebase. Maintenance cost dropped dramatically and features now ship to both platforms together. The performance is genuinely native-grade, which I was skeptical about until I used it.
The custom branded UI we wanted would have cost a fortune to build twice natively. Flutter made it affordable and the result is gorgeous. They also set us up to add a web version later from the same code.
Built with proven tools
Our Flutter technology stack
The modern Flutter and Dart ecosystem, paired with clean state management, for apps that stay fast and easy to maintain.
- Flutter
- Dart
- Riverpod
- Bloc
- Firebase
- GetX
- Dio
- Material
- Cupertino
- Melos
- Codemagic
- Node.js
Questions, answered
Flutter app development FAQs
How much does a Flutter app cost?
The cost depends on the app's features, design, backend and platform requirements. Flutter can reduce development effort by sharing code across iOS and Android, while complex animations, native integrations and custom backends require more work. Every project is scoped and quoted individually.
Is Flutter as good as native?
For the vast majority of apps, yes. Flutter compiles to native ARM code and renders with its own high-performance engine, so it feels smooth and native to users. For apps that lean heavily on the very latest platform-specific APIs, native may edge it, and we will advise honestly if that applies to yours.
Flutter or React Native?
Both are excellent. Flutter gives pixel-identical UI across platforms, superb custom animation and strong performance from its own rendering engine. React Native uses native components and suits teams already invested in React and JavaScript. We recommend based on your design needs, team skills and roadmap, not a house preference.
How long does Flutter development take?
A focused Flutter app typically takes 8 to 16 weeks for both platforms, faster than building two native apps separately. Hot reload speeds up iteration, and you see working builds for both platforms every week.
Can Flutter access device features?
Yes. Through plugins and platform channels, Flutter reaches the camera, Bluetooth, biometrics, GPS, payments, push notifications and any device capability, using existing packages or custom native code we write.
Can Flutter build web and desktop apps too?
Yes. Flutter targets mobile, web and Windows, macOS and Linux desktop from one codebase. We focus on mobile first and can extend to web or desktop later, without a rewrite.
Do you handle both store submissions?
Yes. We build, sign and submit to the App Store and Google Play and manage each review, so your app launches on both platforms together.
How do you keep Flutter apps maintainable?
We use clean architecture and proper state management (Riverpod, Bloc or Provider), write tests and document the codebase, so the app stays easy to change as it grows and your team evolves.
Can you migrate our existing app to Flutter?
Yes. We consolidate separate native apps, or a struggling cross-platform app, into one clean Flutter codebase, migrating features and data while keeping your current users and ratings intact.
Does Flutter support custom branding and animation?
Exceptionally well. Flutter is built for expressive, branded, animated UI, and renders it identically on both platforms. It is one of the strongest reasons teams choose it.
How do you handle Flutter upgrades?
Flutter and Dart release regularly. On a maintenance plan we handle framework and dependency upgrades so your app stays current and never becomes difficult to change.
What happens after launch?
Every project includes a handover and warranty window. Most clients move to a maintenance plan covering Flutter upgrades, OS readiness, monitoring and new features, with support hours structured around US, UK, Canada or India time zones.
Keep exploring
Related services
React Native Apps
The other leading cross-platform framework, compared honestly.
ExploreiOS App Development
Fully native Swift when iOS performance is the priority.
ExploreApp Maintenance & Support
Flutter SDK upgrades, dependency bumps and store policy changes handled before they break your release.
ExploreReady to build a Flutter app that feels native on both platforms?
Tell us what you want to build. You will get a straight answer on scope, cost and timeline, usually within one business day.