Crypto Price Alert — Bitcoin, Ethereum & Altcoin Tracker with Portfolio

Overview

Crypto Price Alert is a lightweight Chrome extension that keeps you in the loop on cryptocurrency prices — without leaving your browser. Set your own price targets and get a native browser notification the moment a coin hits them. Track your portfolio and see your real-time P&L at a glance. Everything runs locally in your browser — no account, no sign-up required. ━━━ CORE FEATURES ━━━ 📈 Live Price Tracker • Real-time prices for any CoinGecko-listed coin • 24h change shown for each coin with trend indicators • Search and add any cryptocurrency instantly • Free tier: track up to 5 coins 🔔 Smart Price Alerts • Set alerts above or below any price target • Percentage-based alerts (e.g. "alert me when BTC drops 10%") • Recurring alerts — keeps firing every time the price crosses your target • One-shot alerts — fires once, stays in triggered state until you re-arm it • Badge counter on the extension icon shows how many alerts are active • Free tier: up to 5 alerts 💼 Portfolio Tracker • Add coin holdings with optional cost basis (price paid per coin) • Live total portfolio value updated in real time • 24h portfolio P&L (dollar and percent) • All-time P&L calculated from your cost basis • Free tier: unlimited portfolio entries 🌡️ Market Sentiment • Fear & Greed Index shown on the Prices tab • Ethereum gas price indicator ⚡ Technical • Manifest V3 — the modern, future-proof extension standard • Background service worker checks prices every minute using Chrome Alarms API • All data stored locally in chrome.storage — nothing is sent to any server • No tracking, no analytics, no third-party data collection ━━━ FREE vs PREMIUM ━━━ Free: • Up to 5 tracked coins • Up to 5 active alerts • Full portfolio tracking Premium (one-time payment — $1 USDC): • Unlimited coins • Unlimited alerts • All future updates included