Feature-Based Structure for Production Apps

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When moving from demo-ready UI to a real production application, FlutKit recommends adopting a Feature-Based Folder Structure.

This approach scales well, improves maintainability, and allows teams to evolve architecture incrementally—without rewriting UI code.

Why Feature-Based Structure?

FlutKit demo screens prioritize clarity and discoverability.
Production apps prioritize scalability and separation of concerns.

A feature-based structure helps you:

  • Keep related files close together
  • Avoid large, unstructured folders
  • Scale teams and features independently
  • Replace mock data with real APIs safely
  • Refactor screens without breaking UI

Core Principle

Group by feature, not by file type.

Each feature owns:

  • UI
  • State
  • Data
  • Models

This aligns with modern Flutter best practices while remaining flexible.

Recommended Feature-Based Structure

Dart
lib/
 ├─ app/
 │   ├─ app.dart
 │   ├─ app_theme.dart
 │   └─ app_router.dart
 │
 ├─ core/
 │   ├─ constants/
 │   ├─ themes/
 │   ├─ widgets/
 │   ├─ utils/
 │   └─ services/
 │
 ├─ features/
 │   ├─ dashboard/
 │   │   ├─ data/
 │   │   │   ├─ models/
 │   │   │   └─ datasources/
 │   │   ├─ logic/
 │   │   ├─ ui/
 │   │   │   ├─ screens/
 │   │   │   └─ widgets/
 │   │   └─ dashboard_feature.dart
 │   │
 │   ├─ analytics/
 │   │   ├─ data/
 │   │   ├─ logic/
 │   │   └─ ui/
 │   │
 │   ├─ authentication/
 │   │   ├─ data/
 │   │   ├─ logic/
 │   │   └─ ui/
 │   │
 │   └─ settings/
 │       ├─ data/
 │       ├─ logic/
 │       └─ ui/
 │
 └─ main.dart

Feature Folder Breakdown

1. data/

Responsible for data handling only.

Dart
data/
 ├─ models/
 │   └─ user_model.dart
 └─ datasources/
     ├─ mock_user_datasource.dart
     └─ api_user_datasource.dart
  • Models define data shape
  • Datasources define where data comes from
  • UI never talks directly to APIs

2. logic/

Handles state and business logic.

Dart
logic/
 ├─ user_provider.dart
 └─ dashboard_controller.dart
  • Provider, Bloc, Riverpod, Cubit—your choice
  • FlutKit does not enforce any solution
  • Logic can be replaced without touching UI

3. ui/

Pure UI implementation.

Dart
ui/
 ├─ screens/
 │   └─ dashboard_screen.dart
 └─ widgets/
     └─ stats_card.dart
  • Stateless where possible
  • Receives data via constructors
  • No API calls
  • No business logic

Mapping from FlutKit Demo Screens

Demo (FlutKit Default)

Dart
lib/views/screens/dashboard/dashboard_analytics_screen.dart

Contains:

  • UI
  • Mock data
  • Local state

Production Refactor

Dart
features/analytics/
 ├─ data/
 ├─ logic/
 └─ ui/screens/analytics_dashboard_screen.dart

Result:

  • Same UI
  • Clean data flow
  • Replace mock → API with minimal changes

Demo vs Production Intent

AspectFlutKit DemoProduction App
DiscoverabilityHighMedium
Copy–pasteEasyReduced
ScalabilityLowHigh
API-readyOptionalRequired
Team-friendlyLimitedStrong

FlutKit intentionally starts simple
Production apps intentionally evolve

When Should You Adopt This Structure?

Recommended when:

  • App consumes real APIs
  • Project grows beyond a few screens
  • Multiple developers are involved
  • Long-term maintenance matters

Not required when:

  • Building prototypes
  • Creating admin UI demos
  • Learning Flutter UI patterns

Key Takeaway

FlutKit UI is production-ready.
Architecture is your choice.

Start simple.
Refactor when needed.
FlutKit supports both.

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