CryptoWatch: Portfolio Tracker
Real-time cryptocurrency portfolio management application tracking 5000+ coins with price alerts, performance analytics, and beautiful data visualizations for crypto investors.
Project Overview
CryptoWatch is a side project built to help crypto investors track their portfolios across multiple wallets and exchanges. The app provides real-time price updates, profit/loss calculations, historical performance charts, and customizable alerts.
Built with a focus on clean UX and fast performance despite handling thousands of cryptocurrencies. Uses CoinGecko API for market data and Firebase for real-time synchronization.
Core Features
Portfolio Management
Track holdings across multiple wallets and exchanges. Add transactions with automatic P&L calculation. Support for 5000+ cryptocurrencies.
Real-time Pricing
Live price updates via WebSocket with 1-minute refresh intervals. Historical price data with customizable time ranges and charts.
Performance Analytics
Detailed profit/loss breakdown by coin and portfolio. ROI calculations, cost basis tracking, realized vs unrealized gains with charts.
Price Alerts
Custom price alerts for any cryptocurrency with browser notifications and email alerts. Support for percentage and absolute thresholds.
Market Overview
Trending coins, biggest gainers/losers, market cap rankings. News feed from multiple sources and global market statistics.
Data Visualization
Interactive charts with candlestick, line, and area views. Portfolio allocation pie charts and CSV export capabilities.
Technical Implementation
Built with React and Firebase for a fast, real-time experience:
Frontend Architecture
React 18 with Hooks, Redux Toolkit for state management, Recharts for visualizations, TailwindCSS styling, and React Query for efficient API calls.
Backend & Data
Firebase Authentication, Firestore for user data, CoinGecko API integration, Cloud Functions for alerts, and real-time data synchronization.
User Experience
Progressive Web App with offline support, browser push notifications, dark mode theme, CSV import/export, and multi-currency support.
Performance & Deployment
Vercel hosting, Firebase backend, GitHub Actions CI/CD, automated testing, and comprehensive performance monitoring.
Results & Impact
User Growth
1000+ monthly active users organically acquired through word-of-mouth. Featured in crypto newsletter reaching 50k subscribers and on ProductHunt.
Performance Excellence
98 Lighthouse score with sub-second load times. Efficient state management handles large portfolios smoothly despite tracking 5000+ coins.
Technical Achievement
Successfully integrated multiple crypto APIs with rate limiting. Built robust alert system processing 1000+ price checks per minute.
Reliability
Zero data loss incidents since launch. Graceful error handling and caching strategies ensure consistent user experience even during API outages.