CoinPeek - Bitcoin Price Badge & Gas Tracker

About

CoinPeek - Your lightweight crypto companion for Chrome

Track Bitcoin and Ethereum prices in real-time without leaving your browser. CoinPeek is designed for traders, developers, and crypto enthusiasts who need quick access to market data.

KEY FEATURES:

Live Price Tracking
- Real-time Bitcoin and Ethereum prices
- 24-hour price change with visual indicators (green/red)
- Price displayed in extension badge for instant visibility

Network Fee Monitoring
- Ethereum gas fees (low, standard, fast)
- Bitcoin transaction fees in sat/vB
- Multiple API sources for reliability

Quick Converter
- Convert between BTC, ETH, and USD instantly
- Swap currencies with one click
- Precise decimal calculations

PERFORMANCE:
- Updates every 60 seconds automatically
- Smart caching reduces API calls by 70%
- Lightweight design - minimal memory footprint
- Instant popup loading with cached data

PRIVACY-FIRST APPROACH:
- All data stored locally on your device
- No account required
- No personal data collected
- No tracking or analytics
- Open source on GitHub

PERMISSIONS EXPLAINED:
We only request what's absolutely necessary:
- Storage: Save cached prices locally for faster loading
- Alarms: Schedule background price updates

We do NOT access your browsing history, tabs, cookies, or any personal data.

DATA SOURCES:
- CoinGecko: Cryptocurrency prices (public API)
- Blocknative: Ethereum gas fees
- Mempool.space: Bitcoin fees (with fallbacks)

PERFECT FOR:
- Crypto traders monitoring market movements
- Developers checking gas fees before deploying
- DeFi users optimizing transaction timing
- Anyone interested in cryptocurrency prices

TECH SPECS:
- Built with Manifest V3 (latest Chrome extension standard)
- Vanilla JavaScript - no heavy frameworks
- Service Worker architecture for efficiency
- Responsive modern UI with dark theme

Open source and free forever. Check out our GitHub for the full source code.