As a Flutter application grows, managing files becomes one of the biggest development challenges.

A small project may start with:

lib/
├── screens/
├── controllers/
├── models/
└── widgets/

This works initially. However, when the project grows to 50, 100, or more screens, these folders become crowded.

For example, a large application may contain:

Authentication
Home
Profile
Products
Cart
Orders
Chat
Notifications
Settings
Payments

If every controller is stored inside one controllers/ folder, finding a particular file becomes difficult.

A much more practical approach is to organize the project feature by feature.

For example:

lib/
└── features/
    ├── auth/
    ├── home/
    ├── profile/
    ├── products/
    ├── cart/
    └── orders/

Then every feature manages its own screens, controllers, models, and widgets.

The basic idea is:

lib/
└── features/
    └── auth/
        ├── screens/
        ├── controller/
        ├── model/
        └── widget/

Another feature follows the same structure:

lib/
└── features/
    └── home/
        ├── screens/
        ├── controller/
        ├── model/
        └── widget/

This keeps every feature independent and easy to manage.

---

Recommended Flutter Project Structure

A clean large Flutter project can look like this:

lib/
│
├── features/
│   │
│   ├── auth/
│   │   ├── screens/
│   │   ├── controller/
│   │   ├── model/
│   │   └── widget/
│   │
│   ├── home/
│   │   ├── screens/
│   │   ├── controller/
│   │   ├── model/
│   │   └── widget/
│   │
│   ├── profile/
│   │   ├── screens/
│   │   ├── controller/
│   │   ├── model/
│   │   └── widget/
│   │
│   ├── products/
│   │   ├── screens/
│   │   ├── controller/
│   │   ├── model/
│   │   └── widget/
│   │
│   ├── cart/
│   │   ├── screens/
│   │   ├── controller/
│   │   ├── model/
│   │   └── widget/
│   │
│   ├── orders/
│   │   ├── screens/
│   │   ├── controller/
│   │   ├── model/
│   │   └── widget/
│   │
│   ├── notifications/
│   │   ├── screens/
│   │   ├── controller/
│   │   ├── model/
│   │   └── widget/
│   │
│   └── settings/
│       ├── screens/
│       ├── controller/
│       ├── model/
│       └── widget/
│
├── app_utils/
│   ├── app_colors.dart
│   ├── app_constants.dart
│   ├── app_images.dart
│   ├── app_routes.dart
│   ├── app_strings.dart
│   ├── app_theme.dart
│   ├── app_utils.dart
│   ├── api_urls.dart
│   ├── validators.dart
│   └── extensions.dart
│
├── services/
│   ├── api_service.dart
│   ├── storage_service.dart
│   ├── notification_service.dart
│   └── connectivity_service.dart
│
└── main.dart

The structure is intentionally simple.

Every feature has its own files, while common application functionality stays in app_utils/ and services/.

---

1. Authentication Feature

Authentication-related files should stay together.

Use:

lib/
└── features/
    └── auth/
        ├── screens/
        ├── controller/
        ├── model/
        └── widget/

A real authentication feature could look like:

lib/
└── features/
    └── auth/
        │
        ├── screens/
        │   ├── login_screen.dart
        │   ├── register_screen.dart
        │   ├── forgot_password_screen.dart
        │   ├── otp_screen.dart
        │   └── reset_password_screen.dart
        │
        ├── controller/
        │   ├── login_controller.dart
        │   ├── register_controller.dart
        │   ├── forgot_password_controller.dart
        │   └── otp_controller.dart
        │
        ├── model/
        │   ├── login_model.dart
        │   ├── register_model.dart
        │   ├── user_model.dart
        │   └── otp_model.dart
        │
        └── widget/
            ├── auth_text_field.dart
            ├── password_field.dart
            ├── auth_button.dart
            └── social_login_button.dart

Everything related to authentication is now available under:

lib/features/auth/

You do not need to search through global model, controller, and screen folders.

---

Authentication Screen

For example:

lib/features/auth/screens/login_screen.dart

The screen should mainly contain UI.

class LoginScreen extends StatelessWidget {
  LoginScreen({
    super.key,
  });

  final LoginController controller =
      Get.put(LoginController());

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Padding(
        padding: const EdgeInsets.all(20),
        child: Column(
          children: [
            AuthTextField(
              controller:
                  controller.emailController,
              hintText: 'Email',
            ),

            const SizedBox(height: 16),

            AuthTextField(
              controller:
                  controller.passwordController,
              hintText: 'Password',
            ),

            const SizedBox(height: 24),

            Obx(
              () => AuthButton(
                title: 'Login',
                isLoading:
                    controller.isLoading.value,
                onTap: controller.login,
              ),
            ),
          ],
        ),
      ),
    );
  }
}

The screen handles the interface.

The controller handles the logic.

---

Authentication Controller

Store it inside:

lib/features/auth/controller/login_controller.dart

Example:

class LoginController extends GetxController {
  final emailController =
      TextEditingController();

  final passwordController =
      TextEditingController();

  final isLoading = false.obs;

  Future<void> login() async {
    if (emailController.text.isEmpty) {
      AppUtils.showError(
        'Please enter email',
      );

      return;
    }

    try {
      isLoading.value = true;

      final response =
          await ApiService.post(
        ApiUrls.login,
        data: {
          'email':
              emailController.text.trim(),
          'password':
              passwordController.text,
        },
      );

      final loginModel =
          LoginModel.fromJson(
        response.data,
      );

      // Save data and navigate.
    } catch (e) {
      AppUtils.showError(
        e.toString(),
      );
    } finally {
      isLoading.value = false;
    }
  }

  @override
  void onClose() {
    emailController.dispose();
    passwordController.dispose();

    super.onClose();
  }
}

This creates a simple flow:

LoginScreen
     ↓
LoginController
     ↓
ApiService
     ↓
Backend

---

Authentication Model

Store models inside:

lib/features/auth/model/

For example:

login_model.dart
user_model.dart
register_model.dart

Example:

class LoginModel {
  final bool? success;
  final String? token;
  final UserModel? user;

  LoginModel({
    this.success,
    this.token,
    this.user,
  });

  factory LoginModel.fromJson(
    Map<String, dynamic> json,
  ) {
    return LoginModel(
      success: json['success'],
      token: json['token'],
      user: json['user'] != null
          ? UserModel.fromJson(
              json['user'],
            )
          : null,
    );
  }
}

The model stays with the feature that uses it.

---

Authentication Widgets

Authentication-specific widgets belong in:

lib/features/auth/widget/

For example:

auth_text_field.dart
auth_button.dart
password_field.dart
social_login_button.dart

These widgets are used only by authentication screens.

That is why they should stay inside auth.

---

2. Home Feature

Now create the Home module independently.

lib/
└── features/
    └── home/
        ├── screens/
        ├── controller/
        ├── model/
        └── widget/

A complete example:

lib/
└── features/
    └── home/
        │
        ├── screens/
        │   └── home_screen.dart
        │
        ├── controller/
        │   └── home_controller.dart
        │
        ├── model/
        │   ├── home_model.dart
        │   ├── banner_model.dart
        │   └── category_model.dart
        │
        └── widget/
            ├── home_header.dart
            ├── home_banner.dart
            ├── category_list.dart
            └── featured_section.dart

Notice that Home does not depend on Auth’s internal folders.

It manages its own code.

---

Home Controller

Location:

lib/features/home/controller/home_controller.dart

Example:

class HomeController extends GetxController {
  final isLoading = false.obs;

  final homeData =
      Rxn<HomeModel>();

  @override
  void onInit() {
    super.onInit();

    getHomeData();
  }

  Future<void> getHomeData() async {
    try {
      isLoading.value = true;

      final response =
          await ApiService.get(
        ApiUrls.home,
      );

      homeData.value =
          HomeModel.fromJson(
        response.data,
      );
    } catch (e) {
      AppUtils.showError(
        e.toString(),
      );
    } finally {
      isLoading.value = false;
    }
  }
}

---

Home Screen

Location:

lib/features/home/screens/home_screen.dart

Example:

class HomeScreen extends StatelessWidget {
  HomeScreen({
    super.key,
  });

  final HomeController controller =
      Get.put(HomeController());

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Obx(
        () {
          if (controller.isLoading.value) {
            return const Center(
              child:
                  CircularProgressIndicator(),
            );
          }

          return ListView(
            children: [
              const HomeHeader(),

              HomeBanner(
                banners:
                    controller
                        .homeData
                        .value
                        ?.banners ??
                    [],
              ),

              CategoryList(
                categories:
                    controller
                        .homeData
                        .value
                        ?.categories ??
                    [],
              ),
            ],
          );
        },
      ),
    );
  }
}

Again:

Screen
  ↓
Controller
  ↓
Model/API

Simple and easy to follow.

---

3. Product Feature

Products should have their own module:

lib/
└── features/
    └── product/
        ├── screens/
        ├── controller/
        ├── model/
        └── widget/

For example:

lib/features/product/
│
├── screens/
│   ├── product_screen.dart
│   ├── product_details_screen.dart
│   └── product_search_screen.dart
│
├── controller/
│   ├── product_controller.dart
│   ├── product_details_controller.dart
│   └── product_search_controller.dart
│
├── model/
│   ├── product_model.dart
│   ├── product_details_model.dart
│   └── product_category_model.dart
│
└── widget/
    ├── product_card.dart
    ├── product_image.dart
    ├── product_price.dart
    ├── product_rating.dart
    └── product_filter.dart

Now if you need to modify Product Details, you immediately know where to look:

lib/features/product/

---

4. Profile Feature

Use exactly the same approach:

lib/features/profile/
│
├── screens/
│   ├── profile_screen.dart
│   ├── edit_profile_screen.dart
│   └── change_password_screen.dart
│
├── controller/
│   ├── profile_controller.dart
│   └── edit_profile_controller.dart
│
├── model/
│   └── profile_model.dart
│
└── widget/
    ├── profile_header.dart
    ├── profile_menu_item.dart
    └── profile_image.dart

The feature remains completely understandable on its own.

---

5. Cart Feature

lib/features/cart/
│
├── screens/
│   └── cart_screen.dart
│
├── controller/
│   └── cart_controller.dart
│
├── model/
│   └── cart_model.dart
│
└── widget/
    ├── cart_item.dart
    ├── cart_price.dart
    └── cart_summary.dart

The same structure continues throughout the application.

---

6. Order Feature

lib/features/order/
│
├── screens/
│   ├── order_screen.dart
│   ├── order_details_screen.dart
│   └── track_order_screen.dart
│
├── controller/
│   ├── order_controller.dart
│   ├── order_details_controller.dart
│   └── track_order_controller.dart
│
├── model/
│   ├── order_model.dart
│   └── order_details_model.dart
│
└── widget/
    ├── order_card.dart
    ├── order_status.dart
    └── tracking_step.dart

This is one of the main advantages of feature-based organization:

Auth     → Auth files
Home     → Home files
Product  → Product files
Cart     → Cart files
Order    → Order files
Profile  → Profile files

Nothing gets mixed unnecessarily.

---

7. Notification Feature

lib/features/notification/
│
├── screens/
│   └── notification_screen.dart
│
├── controller/
│   └── notification_controller.dart
│
├── model/
│   └── notification_model.dart
│
└── widget/
    └── notification_item.dart

If this feature grows later, simply add more files inside the same feature.

---

8. Settings Feature

lib/features/settings/
│
├── screens/
│   ├── settings_screen.dart
│   ├── privacy_screen.dart
│   └── language_screen.dart
│
├── controller/
│   └── settings_controller.dart
│
├── model/
│   └── settings_model.dart
│
└── widget/
    ├── settings_tile.dart
    └── settings_section.dart

You do not need to create folders that a feature does not actually use.

For example, if Settings does not require a model:

lib/features/settings/
├── screens/
├── controller/
└── widget/

is completely fine.

---

The Main Rule

The easiest way to remember the architecture is:

lib/features/<feature_name>/

Then:

screens/
controller/
model/
widget/

For example:

lib/features/auth/screens/
lib/features/auth/controller/
lib/features/auth/model/
lib/features/auth/widget/

and:

lib/features/home/screens/
lib/features/home/controller/
lib/features/home/model/
lib/features/home/widget/

and:

lib/features/profile/screens/
lib/features/profile/controller/
lib/features/profile/model/
lib/features/profile/widget/

This pattern continues for every major feature.

---

Why This Is Better Than Global Folders

Avoid this for large applications:

lib/
├── screens/
│   ├── login_screen.dart
│   ├── home_screen.dart
│   ├── profile_screen.dart
│   ├── product_screen.dart
│   ├── cart_screen.dart
│   └── ...
│
├── controllers/
│   ├── login_controller.dart
│   ├── home_controller.dart
│   ├── profile_controller.dart
│   ├── product_controller.dart
│   └── ...
│
├── models/
└── widgets/

Because once the application becomes large, every folder contains unrelated features.

Instead use:

features/
├── auth/
├── home/
├── product/
├── cart/
├── order/
└── profile/

Now related code remains physically close.

---

Use app_utils for Common Application Code

Alongside features, create:

lib/app_utils/

This folder contains code used throughout the application.

A useful structure is:

lib/
└── app_utils/
    ├── app_colors.dart
    ├── app_constants.dart
    ├── app_images.dart
    ├── app_routes.dart
    ├── app_strings.dart
    ├── app_theme.dart
    ├── app_utils.dart
    ├── api_urls.dart
    ├── validators.dart
    └── extensions.dart

This keeps common configuration out of individual features.

---

app_colors.dart

Store application colors in:

lib/app_utils/app_colors.dart

Example:

class AppColors {
  static const primary =
      Color(0xFF1565C0);

  static const secondary =
      Color(0xFF42A5F5);

  static const background =
      Color(0xFFF7F8FA);

  static const white =
      Colors.white;

  static const black =
      Colors.black;

  static const error =
      Color(0xFFD32F2F);
}

Usage:

Container(
  color: AppColors.primary,
)

Instead of repeatedly writing color values across screens.

---

app_strings.dart

Store common application strings:

lib/app_utils/app_strings.dart

Example:

class AppStrings {
  static const appName =
      'My Application';

  static const login =
      'Login';

  static const logout =
      'Logout';

  static const somethingWentWrong =
      'Something went wrong';

  static const noInternet =
      'No internet connection';
}

Usage:

Text(
  AppStrings.login,
)

---

app_images.dart

Manage asset paths centrally:

class AppImages {
  static const logo =
      'assets/images/logo.png';

  static const placeholder =
      'assets/images/placeholder.webp';

  static const noData =
      'assets/images/no_data.webp';

  static const profilePlaceholder =
      'assets/images/profile.webp';
}

Usage:

Image.asset(
  AppImages.logo,
)

This makes asset management much easier.

---

app_constants.dart

Store general constants:

class AppConstants {
  static const appName =
      'My App';

  static const pageLimit = 20;

  static const animationDuration =
      Duration(milliseconds: 300);

  static const requestTimeout =
      Duration(seconds: 30);
}

Avoid scattering magic values throughout the project.

---

api_urls.dart

Keep API endpoints centralized.

class ApiUrls {
  static const baseUrl =
      'https://api.example.com';

  static const login =
      '/auth/login';

  static const register =
      '/auth/register';

  static const home =
      '/home';

  static const products =
      '/products';

  static const profile =
      '/profile';

  static const orders =
      '/orders';
}

Now:

ApiService.get(
  ApiUrls.products,
);

is much cleaner than hardcoding API URLs in every controller.

---

app_routes.dart

Keep routes centralized:

class AppRoutes {
  static const login =
      '/login';

  static const home =
      '/home';

  static const profile =
      '/profile';

  static const products =
      '/products';

  static const cart =
      '/cart';

  static const orders =
      '/orders';
}

Usage:

Get.toNamed(
  AppRoutes.profile,
);

---

validators.dart

Put reusable validation here:

class Validators {
  static String? email(
    String? value,
  ) {
    if (value == null ||
        value.trim().isEmpty) {
      return 'Email is required';
    }

    if (!GetUtils.isEmail(value.trim())) {
      return 'Enter a valid email';
    }

    return null;
  }

  static String? password(
    String? value,
  ) {
    if (value == null ||
        value.isEmpty) {
      return 'Password is required';
    }

    if (value.length < 6) {
      return 'Password must contain at least 6 characters';
    }

    return null;
  }
}

Then every feature can use:

validator: Validators.email,

without duplicating validation code.

---

app_utils.dart

app_utils.dart can contain common helper functions.

For example:

class AppUtils {
  static void hideKeyboard() {
    FocusManager.instance.primaryFocus
        ?.unfocus();
  }

  static void showSuccess(
    String message,
  ) {
    Get.snackbar(
      'Success',
      message,
      snackPosition:
          SnackPosition.BOTTOM,
    );
  }

  static void showError(
    String message,
  ) {
    Get.snackbar(
      'Error',
      message,
      snackPosition:
          SnackPosition.BOTTOM,
    );
  }
}

Usage:

AppUtils.hideKeyboard();

AppUtils.showSuccess(
  'Profile updated successfully',
);

---

Do Not Put Everything Inside app_utils.dart

This is important.

Avoid turning:

app_utils.dart

into a 3,000-line file.

Bad:

AppUtils.login();
AppUtils.getProducts();
AppUtils.placeOrder();
AppUtils.makePayment();
AppUtils.updateProfile();

Those functions belong to their individual features.

AppUtils should contain only generic helpers such as:

Keyboard handling
Snackbar
Dialogs
Formatting
Validation helpers
Device helpers
Common calculations

---

Services Folder

For application-wide services, create:

lib/services/

Example:

lib/services/
├── api_service.dart
├── storage_service.dart
├── notification_service.dart
├── connectivity_service.dart
└── permission_service.dart

These services can be used by multiple features.

---

API Service

For example:

class ApiService {
  static final Dio _dio = Dio(
    BaseOptions(
      baseUrl: ApiUrls.baseUrl,
      connectTimeout:
          const Duration(seconds: 30),
      receiveTimeout:
          const Duration(seconds: 30),
    ),
  );

  static Future<Response<dynamic>> get(
    String url, {
    Map<String, dynamic>? queryParameters,
  }) {
    return _dio.get(
      url,
      queryParameters:
          queryParameters,
    );
  }

  static Future<Response<dynamic>> post(
    String url, {
    dynamic data,
  }) {
    return _dio.post(
      url,
      data: data,
    );
  }
}

Now any feature controller can call:

final response =
    await ApiService.get(
  ApiUrls.products,
);

---

Storage Service

Instead of accessing local storage differently in every controller, create:

lib/services/storage_service.dart

Example:

class StorageService {
  static late SharedPreferences _prefs;

  static Future<void> init() async {
    _prefs =
        await SharedPreferences
            .getInstance();
  }

  static Future<void> saveToken(
    String token,
  ) async {
    await _prefs.setString(
      'token',
      token,
    );
  }

  static String? getToken() {
    return _prefs.getString(
      'token',
    );
  }

  static Future<void> clear() async {
    await _prefs.clear();
  }
}

Now:

StorageService.saveToken(
  token,
);

can be used anywhere.

---

Common Widget: Where Should It Go?

If a widget belongs to only one feature:

ProductCard

put it in:

lib/features/product/widget/product_card.dart

If a widget is used everywhere:

CustomButton
CustomTextField
Loader
EmptyView
ErrorView

you can create:

lib/common_widget/

For example:

lib/common_widget/
├── custom_button.dart
├── custom_text_field.dart
├── custom_loader.dart
├── empty_view.dart
├── error_view.dart
└── custom_app_bar.dart

This keeps feature widgets separate from application-wide widgets.

---

Final Recommended Structure

For a real large Flutter application, the final structure can be:

lib/
│
├── features/
│   │
│   ├── auth/
│   │   ├── screens/
│   │   │   ├── login_screen.dart
│   │   │   ├── register_screen.dart
│   │   │   └── forgot_password_screen.dart
│   │   ├── controller/
│   │   │   ├── login_controller.dart
│   │   │   └── register_controller.dart
│   │   ├── model/
│   │   │   ├── login_model.dart
│   │   │   └── user_model.dart
│   │   └── widget/
│   │       ├── auth_button.dart
│   │       └── auth_text_field.dart
│   │
│   ├── home/
│   │   ├── screens/
│   │   │   └── home_screen.dart
│   │   ├── controller/
│   │   │   └── home_controller.dart
│   │   ├── model/
│   │   │   └── home_model.dart
│   │   └── widget/
│   │       ├── home_banner.dart
│   │       └── category_list.dart
│   │
│   ├── product/
│   │   ├── screens/
│   │   ├── controller/
│   │   ├── model/
│   │   └── widget/
│   │
│   ├── cart/
│   │   ├── screens/
│   │   ├── controller/
│   │   ├── model/
│   │   └── widget/
│   │
│   ├── order/
│   │   ├── screens/
│   │   ├── controller/
│   │   ├── model/
│   │   └── widget/
│   │
│   ├── notification/
│   │   ├── screens/
│   │   ├── controller/
│   │   ├── model/
│   │   └── widget/
│   │
│   ├── profile/
│   │   ├── screens/
│   │   ├── controller/
│   │   ├── model/
│   │   └── widget/
│   │
│   └── settings/
│       ├── screens/
│       ├── controller/
│       ├── model/
│       └── widget/
│
├── app_utils/
│   ├── app_colors.dart
│   ├── app_constants.dart
│   ├── app_images.dart
│   ├── app_routes.dart
│   ├── app_strings.dart
│   ├── app_theme.dart
│   ├── app_utils.dart
│   ├── api_urls.dart
│   ├── validators.dart
│   └── extensions.dart
│
├── common_widget/
│   ├── custom_button.dart
│   ├── custom_text_field.dart
│   ├── custom_loader.dart
│   ├── custom_app_bar.dart
│   ├── empty_view.dart
│   └── error_view.dart
│
├── services/
│   ├── api_service.dart
│   ├── storage_service.dart
│   ├── notification_service.dart
│   └── connectivity_service.dart
│
└── main.dart

This structure gives each section its own clear location.

---

How to Decide Where a File Goes

The rule is very simple.

Authentication related?
        ↓
lib/features/auth/

Home related?
        ↓
lib/features/home/

Product related?
        ↓
lib/features/product/

Profile related?
        ↓
lib/features/profile/

Generic utility?
        ↓
lib/app_utils/

Reusable application widget?
        ↓
lib/common_widget/

Application-wide service?
        ↓
lib/services/

For example, if you create:

EditProfileScreen

it goes to:

lib/features/profile/screens/edit_profile_screen.dart

Its controller:

lib/features/profile/controller/edit_profile_controller.dart

Its model:

lib/features/profile/model/profile_model.dart

Its special image widget:

lib/features/profile/widget/profile_image.dart

That is the main concept behind this project structure.

---

Should Every Feature Have All Four Folders?

No.

Create only what you need.

For example, Splash may only require:

lib/features/splash/
├── screens/
│   └── splash_screen.dart
└── controller/
    └── splash_controller.dart

There is no reason to create:

model/
widget/

if Splash does not need them.

Similarly, a complex Product feature might need all four:

screens/
controller/
model/
widget/

Keep the architecture practical.

---

Why This Structure Works Well for Large Projects

Suppose six developers are working on the same project.

One developer works on:

lib/features/auth/

Another works on:

lib/features/home/

Another works on:

lib/features/product/

Another works on:

lib/features/order/

Most feature code remains isolated.

This makes it easier to:

• Find files
• Review code
• Fix bugs
• Add new screens
• Maintain controllers
• Manage models
• Reuse feature widgets
• Work with multiple developers
• Remove or replace features
• Understand a new project quickly

---

Avoid Overengineering

For this style of project, you do not necessarily need:

data/
domain/
presentation/
entities/
repositories/
use_cases/

inside every feature.

Those layers can be useful in certain applications, but adding them everywhere can make a straightforward Flutter project harder to navigate.

For many production applications, this flow is enough:

Screen
   ↓
Controller
   ↓
API Service
   ↓
Model

Or:

User Action
    ↓
Screen
    ↓
Controller
    ↓
ApiService
    ↓
Backend
    ↓
Model
    ↓
Controller
    ↓
Screen

It is simple, predictable, and easy for another Flutter developer to understand.

---

Best Practices

Keep feature code inside its feature. Avoid putting Home models inside Auth or Product controllers inside a global controller folder.

Keep common utilities inside app_utils, but do not use it as a dumping ground for every function.

Use common_widget only for widgets that are genuinely reused across multiple features.

Keep API and storage handling centralized so every controller does not create its own networking or persistence implementation.

Finally, keep naming consistent:

login_screen.dart
login_controller.dart
login_model.dart

home_screen.dart
home_controller.dart
home_model.dart

profile_screen.dart
profile_controller.dart
profile_model.dart

This consistency becomes extremely valuable as the project grows.

---

Conclusion

A large Flutter project does not need a complicated folder architecture to remain maintainable.

A clean practical structure is:

lib/
├── features/
├── app_utils/
├── common_widget/
├── services/
└── main.dart

Inside features, separate every major application section:

features/
├── auth/
├── home/
├── product/
├── cart/
├── order/
├── notification/
├── profile/
└── settings/

Then give each feature only the folders it needs:

auth/
├── screens/
├── controller/
├── model/
└── widget/

The same structure can be repeated independently for Home:

home/
├── screens/
├── controller/
├── model/
└── widget/

and Product:

product/
├── screens/
├── controller/
├── model/
└── widget/

This gives the project a simple rule:

Feature-specific code stays inside its feature. Common application code stays outside the features.

That makes the codebase easier to navigate, easier to scale, and much easier for a Flutter team to maintain as the application grows.