ECHO - Accessibility-Focused Announcement App

ECHO receives live public announcements from a backend, displays them as readable alerts, and personalizes content based on user profile (train, platform, disability flag).

Features

• Real-time announcement feed
• User profile personalization
• Train & platform filters
• Push notifications
• Accessibility mode (large text, high contrast, TTS)
• Offline caching
• Dark/Light theme
• Multi-language support
• PWD badge indicator
• Voice read-out (TTS)
• Favorites & History

Setup

flutter pub get
flutter run

Note: If platform folders (android/, ios/) are missing, run:

flutter create . --org com.echo.app --project-name echo

Configuration

Supabase Auth

Set environment variables or replace in lib/main.dart:

• SUPABASE_URL - Your Supabase project URL
• SUPABASE_ANON_KEY - Your Supabase anon key

API Base URL

Set in lib/core/constants/api_constants.dart:

• API_BASE_URL - Backend API base URL (default: https://api.echo.app)

Architecture

• Clean Architecture + MVVM
• State Management: Riverpod
• Navigation: go_router

Project Structure

lib/
├── core/           # Constants, themes, utils, router
├── data/           # Models
├── presentation/   # Screens, widgets
├── providers/      # Riverpod state
├── services/       # API, Auth, Cache, Notification, TTS, Connectivity
└── main.dart