CarrySo
Menu
Service

Flutter app development services

We build production Flutter apps: one Dart code base, compiled to native code, with an architecture chosen for the app's complexity. Every app CarrySo has published on Google Play is built with Flutter.

Language
Dart
State management
GetX, Riverpod, Bloc
Local storage
Isar, Hive, Drift, SQLite
Targets
Android and iOS from one code base
Discuss your app See our work

What is Flutter?

Flutter is Google's open-source UI toolkit for building apps for mobile, web and desktop from a single code base written in Dart. Release builds are compiled ahead of time to native machine code, and Flutter draws its own widgets, so an app looks and behaves the same on every supported platform.

Why businesses choose Flutter for mobile apps

  • One code base for Android and iOS reduces build and maintenance effort
  • Fast iteration during development with hot reload
  • Full control over the UI, which suits branded and custom designs
  • Strong performance for animation-heavy and media-heavy screens
  • A mature package ecosystem and first-party Firebase support

Cross-platform app development with Flutter

Cross-platform development means shipping the same app to Android and iOS without writing it twice. With Flutter, the UI, business logic and most integrations are shared. Platform-specific work is limited to things like permissions, store configuration and the occasional native plugin.

When an app needs a native API that no maintained package covers, Flutter platform channels let us call Kotlin or Swift code directly. The rest of the app stays shared.

How we build Flutter apps

Engineering choices from our published Flutter apps
ConcernOur approachWhere we've used it
ArchitectureFeature-first folders with a shared core; data, domain and presentation separated where the app is largeBG Remover AI, Photo Compressor
StateGetX for fast, simple apps; Riverpod or Bloc when state is complexCropFlow (Riverpod), GIF Maker (Bloc)
PerformanceHeavy image and video work in background isolates, keeping the UI thread freeBG Remover AI, CropFlow
MediaFFmpeg for video, the image package for pixels, custom binary parsers when neededGIF Maker, MetaClean
DataIsar or Hive for local persistence; Firestore when data must syncHEIC Converter Pro, GIF Maker
TestsUnit tests on parsers, repositories and controllers; widget smoke testsMetaClean, Photo Compressor

When Flutter is not the right choice

Flutter is not the best fit for every project. If the app is mostly a thin wrapper around brand-new OS features, such as widgets or system integrations released in the latest iOS or Android version, native development may reach them sooner. We'll tell you during discovery if we think that applies to your app.

Flutter project process

  1. 1. Discovery and scope

    We go through who the app is for, the one job it must do well, and what can wait. You get a written scope with the screens, features, integrations and release target.

  2. 2. UX flows and interface design

    We map the main user journeys before writing code, then design screens that follow Material guidelines on Android and feel right on each platform.

  3. 3. Build in short iterations

    The app is built in Flutter in small increments, so you can install test builds on a real phone early and change direction cheaply.

  4. 4. Testing

    Business logic, parsers and data layers get automated unit tests, and release builds are checked on physical devices before they reach users.

  5. 5. Store release

    We prepare the store listing, screenshots, privacy policy, Data safety form and release build, then handle review and the staged rollout.

  6. 6. Maintain and improve

    After launch we watch crashes, reviews and release age, keep SDKs and target API levels current, and ship improvements.

Evidence: flutter app development in our own apps

These are CarrySo's own products, published on Google Play under our developer account. Figures are taken from Google Play when this site was built; each card links to the case study.

Frequently asked questions

Is Flutter good for production apps?

Yes. Flutter is used for large production apps and is maintained by Google. All of the apps CarrySo publishes on Google Play are production Flutter apps with real users, crash reporting and regular updates.

Flutter vs React Native: which is better?

Both build cross-platform apps from one code base. Flutter compiles Dart to native code and draws its own UI, which gives consistent visuals and strong performance for custom or media-heavy interfaces. React Native renders native components from JavaScript and suits teams already working in React. We specialise in Flutter.

Can you add features to our existing Flutter app?

Yes. We review the code base first (architecture, dependencies, tests and crash data), then agree a plan for new features, including any clean-up the features depend on.

Which Firebase services do you use with Flutter?

Across our apps and internal tools we use Cloud Firestore, Cloud Functions, Firebase Cloud Messaging, Crashlytics, Authentication, Storage and Hosting. We pick services per app rather than adding everything by default.

Guides on this topic

Mobile app development

Mobile app development from idea to app store: Flutter apps for Android and iOS, SaaS mobile apps, MVPs, UI/UX, backend APIs, store deployment and maintenance.

Cross-platform app development

Cross-platform mobile app development with Flutter: one code base for Android and iOS, native performance, shared tests, and lower build and maintenance cost.

Android app development

Android app development with Flutter: apps built for real devices, published and maintained on Google Play, with Data safety, privacy policies and updates.

iOS app development

iOS app development with Flutter: iPhone and iPad apps from one code base, Apple Developer setup, TestFlight, App Store review, privacy labels and updates.

Tell us what you want to build. We'll reply by email with questions, and then with a proposed scope and estimate.

Start a project Email carrysoofficial@gmail.com