FinEx - AI powered expense manager.
FinEx is a modern finance manager that helps users track expenses and income, split group costs fairly, and get AI-powered insights. The product is available on the web and as an Android app on Google Play, built with React Native and Next.js for a fast, cohesive experience.
Mobile AppAndroid AppiOS AppReact NativeNext.jsTypeScriptNode.jsPostgreSQLAI/MLFinance
Screenshots
Technologies Used
- React Native for cross-platform mobile development
- Next.js 16 for web application
- TypeScript for type safety
- Node.js & Express for backend API
- PostgreSQL for database management
- OpenAI API for AI-powered insights
- Firebase for authentication and notifications
- Tailwind CSS for styling
Key Features
- Real-time expense tracking and categorization
- AI-powered financial insights and recommendations
- Group expense splitting with automatic calculations
- Advanced analytics with charts and reports
- Multi-currency support
- Privacy-first design with end-to-end encryption
- Offline mode support
- Cross-platform synchronization
Challenges
- Complex state management for financial transactions
- Real-time synchronization across multiple devices
- AI integration for natural language queries
- Fair expense splitting algorithms
- Performance optimization for large datasets
Solutions
- Implemented Redux for centralized state management
- Built robust API with WebSocket support for real-time updates
- Integrated OpenAI API with custom prompt engineering
- Developed efficient algorithms for expense splitting
- Optimized database queries and implemented caching strategies
Results & Impact
100% client satisfaction rate
4.9★ user rating on app stores
30 seconds to first transaction
Zero data breaches - privacy-first approach
Successfully handling 10,000+ active users