A single codebase
iOS and Android share the same application code, which reduces development, testing and maintenance effort compared with two native applications.
Expertise · Flutter
Custom Flutter Development: One iOS and Android App, One Codebase
Etixio handles custom Flutter development for your iOS and Android applications: a shared codebase, user flows designed for mobile and a solid connection to your business services. We design, develop, publish and maintain the application, including its AI features.
Understanding the technology
Flutter in your project.
Flutter makes it possible to develop interfaces and applications in Dart for multiple platforms. It gives the product a common foundation while still requiring you to handle the constraints specific to the target devices and operating systems. Etixio uses it in mobile projects connected to business services.
The benefits for your product
Why choose Flutter?
Flutter, Google’s open source framework, is now one of the strongest options for building a cross-platform mobile application without compromising on interface quality.
Near-native performance
Dart code is compiled to native code and the Impeller rendering engine draws the interface directly, with no JavaScript bridge.
Full control over the interface
Flutter widgets deliver identical, precise rendering on both platforms, with Material Design 3 or Cupertino components to follow iOS conventions.
Fast iterations
Hot reload and built-in debugging tools shorten the back-and-forth between design and development.
A well-supported ecosystem
Maintained by Google, with an active community, extensive documentation and regular updates to Flutter and Dart.
Our scope of work
The work we take on.
User interfaces
Design screens, their states and interactions for phone use.
Data & services
Connect the application to APIs and handle access, caching and network errors.
Distribution
Check plugins and user flows on the target devices before publishing.
Our Flutter expertise
The Flutter stack we master.
Core
Flutter 3 and Dart 3 (null safety, pattern matching, records), Impeller rendering engine.
State management & architecture
Riverpod for complex, testable applications, Bloc/Cubit for strict separation between business logic and UI, Provider for simple cases.
Interface & navigation
Material Design 3 and Cupertino widgets, GoRouter for declarative navigation and deep links.
Back end & integration
Dio for HTTP calls (interceptors, retries), GraphQL clients, Firebase (authentication, Firestore, notifications), connection to your business APIs.
Quality & publishing
Unit, widget and integration tests, automated builds and publishing to the App Store and Google Play with Fastlane and GitHub Actions.
Flutter and AI
AI features in your mobile application.
A conversational assistant, natural language search across a catalog or documentation, reading a photographed document, voice input: these features can be integrated into a Flutter application. We route model calls through your back end to protect keys, control the data sent and track costs, then work on the interface (progressive responses, loading states, errors) so it stays readable on a phone screen.
See our AI solutions for business.
In the field
From technology to real-world use.
In an application used on the go, we build the user flow with its loading states, connection losses and recoveries. API exchanges, local storage and device features are tested together. The Gorilla project notably shows Flutter working alongside web and back-end technologies within the same product scope.
The choices that matter
The choices to review before building.
Sharing code does not remove the need for checks on iOS and Android. Plugins, permissions, accessibility and distribution must be reviewed. We assess native requirements and the device fleet before deciding what can really be shared.
From work to deliverables
Delivery your team can take over.
The scope of work specifies the components to build or take over and the validation conditions. We prepare what is needed to understand the changes, verify them and continue the work.
- Application and integrations
- User flows tested on target devices
- Distribution preparation
Frequently asked questions
Flutter development: your questions.
What is Flutter and why is it so widely used?
Flutter is Google’s open source cross-platform framework. It lets you build iOS and Android applications from a single Dart codebase, with native compilation, hot reload that speeds up development and an ecosystem that is now mature.
Flutter or React Native, which should you choose?
Flutter draws the interface itself and compiles to native code, which gives very consistent rendering and good animation performance. React Native relies on native components and JavaScript or TypeScript, which suits a team already experienced with React. The choice depends on the team, the existing codebase and the type of interface.
When should you choose Flutter over native development?
Flutter suits most business and consumer applications that need to ship on iOS and Android with a controlled budget and a custom interface. Native development (Swift or Kotlin) remains preferable for highly platform-specific needs or extreme performance.
Is Flutter suitable for enterprise applications?
Yes. It is used in production by many companies, and maintaining a single codebase simplifies ongoing development. We have used it notably for the Gorilla eSIM mobile app and for the mobile app of a SaaS document exchange platform.
How do you manage state in a Flutter application?
Riverpod for complex, testable applications, Bloc/Cubit when you want very strict separation between logic and UI, Provider for simple cases. The choice depends on the size of the application and the team that will maintain it.
How does a Flutter application perform?
Close to native for the vast majority of uses, thanks to ahead-of-time compilation and the Impeller rendering engine. We measure startup time, smoothness and memory usage on the devices your users actually use.
How do you publish a Flutter application?
The application is compiled separately for iOS and Android, then submitted to the App Store and Google Play according to their respective rules. We automate builds, signing and publishing with Fastlane and a continuous integration pipeline.
Can AI features be added to a Flutter application?
Yes. An assistant, natural language search, document reading or voice input can be integrated into the application, with model calls routed through your back end for security and cost tracking.
What engagement models do you offer?
A fixed-price project to design and publish an application, a dedicated team to evolve it over time, or targeted work: performance, taking over an existing application, migration to Flutter.
Let’s talk about your technical context.
Tell us about the application, the issue to address and the known constraints. We will review the dependencies and the first scope of work with your team.