Flutter App Builder

Flutter App Builder

Build production-ready Flutter apps with authentication, databases, and security features ready for App Store deployment.

Development workflow

1. Initialize project - Create Flutter project structure with proper architecture
2. Implement core features - Add authentication, database, state management
3. Add security - Implement secure storage, API security, data encryption
4. Prepare for deployment - Configure app signing, store listings, build releases
5. Deploy - Submit to App Store and Google Play

Project initialization

Start by copying the base template from assets/flutter-template/ to create a well-structured Flutter project:

cp -r assets/flutter-template/ <project-name>
cd <project-name>
flutter pub get

The template includes:

• Clean architecture with feature-based organization
• State management setup (Provider/Riverpod)
• Navigation structure
• Theme configuration
• Common utilities

Core feature implementation

Authentication

For authentication patterns and implementation guides, see references/authentication.md.

Common patterns:

• Firebase Auth: Email/password, Google Sign-In, Apple Sign-In
• Supabase Auth: Similar to Firebase with PostgreSQL backend
• Custom backend: JWT tokens with secure storage

Database integration

For database setup and patterns, see references/database.md.

Options:

• Firebase Firestore: Real-time NoSQL, good for most apps
• Supabase: PostgreSQL with real-time features
• SQLite: Local-first apps with offline support
• Hive/Isar: Fast local storage for Flutter

State management

The template uses Provider by default. For complex apps, consider:

• Riverpod: Modern, compile-safe Provider
• Bloc: Structured state management with events
• GetX: All-in-one solution (state + routing + dependencies)

See references/state-management.md for implementation patterns.

Security implementation

CRITICAL security practices:

1. Secure storage: Never store sensitive data in SharedPreferences

   • Use flutter_secure_storage for tokens, API keys
   • See references/security.md for patterns

2. API security:

   • Use HTTPS only
   • Implement certificate pinning for sensitive apps
   • Store API keys in environment variables, not code

3. Data encryption:

   • Encrypt sensitive local data
   • Use encrypted databases for sensitive information

4. Input validation:

   • Validate all user inputs
   • Sanitize data before database operations

Full security checklist in references/security.md.

App Store deployment

Pre-deployment checklist

1. Update app metadata:

   • App name, version, build number
   • Bundle identifier (iOS) / Application ID (Android)
   • Icons and splash screens

2. Configure signing:

   • iOS: Generate certificates, provisioning profiles
   • Android: Generate signing keystore
   • See references/deployment.md for step-by-step

3. Test thoroughly:

   • Run on real devices (iOS and Android)
   • Test all features, especially authentication flows
   • Check performance and memory usage

4. Build release versions:

   flutter build ios --release
   flutter build appbundle --release
   

Store submission

Complete submission guides in references/deployment.md:

• App Store Connect configuration
• Google Play Console setup
• Screenshots, descriptions, privacy policies
• Review guidelines compliance

Testing and debugging

Use these scripts for common development tasks:

# Run with hot reload
flutter run

# Run tests
flutter test

# Analyze code quality
flutter analyze

# Check for outdated packages
flutter pub outdated

Common patterns and solutions

For frequently needed implementations:

• Push notifications: See references/features.md
• In-app purchases: See references/features.md
• Location services: See references/features.md
• Camera and image handling: See references/features.md
• API integration: See references/api-integration.md

Troubleshooting

Common issues and solutions in references/troubleshooting.md.