A Visual Guide to Clean Architecture
Interactively explore the layers, components, and data flows that make Clean Architecture a powerful pattern for building scalable and maintainable Flutter applications.
Why Clean Architecture?
This architecture provides a structured approach that yields significant, long-term advantages for complex projects. Here are the core benefits.
Enhanced Testability
Isolates business logic from UI and databases, making unit tests faster and simpler to write.
Framework Independent
Your core logic doesn’t depend on Flutter or other packages, making upgrades and migrations easier.
High Maintainability
Separation of concerns means changes in one layer don’t break others, simplifying updates.
Scalable & Flexible
The modular structure supports application growth and makes adding new features straightforward.
Explore the Layers
Clean Architecture is organized into concentric circles, with a strict rule: dependencies only point inwards. Click on any component to see its role, responsibilities, and a code example.
Domain
Data
Presentation
Select a Component
Click an item in the diagram to learn about its role.
Data Flow in Action
Follow the journey of a user request from the UI to the data source and back. Click “Next Step” to see how each component interacts in a predictable, unidirectional flow.
Practical Guide
Explore recommended folder structures and best practices for implementing Clean Architecture in a real-world Flutter project.
Recommended Folder Structure
lib/
├── core/
├── domain/
│ ├── entities/
│ ├── repositories/
│ └── usecases/
├── data/
│ ├── datasources/
│ ├── models/
│ └── repositories/
└── presentation/
├── pages/
├── viewmodels/
└── widgets/
When to Use It?
✅ Ideal For:
Large, complex applications with a long lifespan where testability and maintainability are critical (e.g., banking, healthcare, major e-commerce apps).
⚠️ Caution For:
Small, simple apps or prototypes. The setup can be overkill and slow down initial development (over-engineering).