flutter-architecting-apps

Layered architecture in Flutter separates UI, logic, and data concerns into three layers: UI (Views and ViewModels), optional domain (complex workflows), and Data (Repositories and Services). This structure improves testability and maintainability as projects grow.

Separate UI, logic, and data in Flutter by enforcing clear boundaries: use Views and ViewModels for the UI layer, an optional domain layer for complex workflows, and Repositories and Services for the data layer. This ensures distinct responsibilities across features.

Yes, you can use layered architecture to refactor existing Flutter apps. The 3-layer structure with Views, ViewModels, Repositories, and Services is designed for both new projects and refactors aiming to improve scalability and easier testing across features.

The best way to organize Flutter repositories and services for maintainability is placing them in a dedicated Data layer. This enforces clear boundaries with the UI and domain layers, ensuring separation of concerns and easier testing across features.

You need a domain layer in Flutter app architecture when handling complex workflows. It is an optional layer between the UI and Data layers that provides clear boundaries for Views, ViewModels, Repositories, and Services, improving overall maintainability.