CryptoLens

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Core Features ​

CryptoLens is designed to provide a high-frequency, responsive dashboard for cryptocurrency monitoring without the bloat of traditional portfolio tracking apps.

⚡ Live Prices ​

CryptoLens utilizes Binance WebSockets to stream high-frequency, real-time price updates directly to your screen.

  • WebSocket Streaming: Instead of continuously polling HTTP endpoints, the app establishes a persistent connection to receive live ticker updates.
  • Low Latency: Market movements are reflected instantly with minimal overhead on device memory and battery.
  • Wide Coverage: Supports hundreds of trading pairs.

📊 ETF Flow Tracking ​

Cryptocurrency ETFs (Exchange-Traded Funds) are a massive driver of modern market liquidity. CryptoLens aggregates Spot Bitcoin (BTC) and Spot Ethereum (ETH) ETF flows.

  • Daily Net Flows: Track inflows and outflows on a daily basis.
  • Historical Data: View historical trends to gauge institutional interest over time.
  • Sourced Proxying: Pulled and cleaned via our worker backend for fast, cached queries.

🧠 Market Sentiment (Fear & Greed) ​

Understanding crowd psychology is vital in volatile markets. CryptoLens integrates the Crypto Fear & Greed Index.

  • Sentiment Indicator: Displays current score (0 to 100) and classification (Extreme Fear, Fear, Neutral, Greed, Extreme Greed).
  • Historic Trends: See how sentiment has evolved over the past weeks/months.
  • Visual Integration: Custom progress meters match our terminal-inspired dark green styling.

📈 Market Insights ​

Get a holistic overview of the market at any given moment:

  • Gainers & Losers: Quickly scan top daily performers.
  • Trending Coins: See which assets are generating the highest search volume.
  • Global Metrics: Total market capitalization, 24h trading volume, and Bitcoin/Ethereum dominance statistics.

📉 Interactive Charts ​

CryptoLens displays optimized sparklines and history charts:

  • Fast Render Sparklines: View 24h trends directly on list items without lagging scroll performance.
  • Global History Chart: Interactive charts showing the total market cap history over days, weeks, or months.

📱 Performance Optimization ​

Under the hood, CryptoLens is built for extreme speed and smooth responsiveness:

  • NativeWind v5 & Tailwind CSS v4: Highly optimized, compile-time utility styling mapping directly to React Native primitives.
  • Shopify FlashList: Replaces standard React Native FlatLists, enabling 120Hz smooth scrolling for lists containing hundreds of items by recycling views.
  • Zustand & TanStack Query: Lightweight global state management paired with robust asynchronous cache management (stale-while-revalidate, background refetching).
  • Serverless Edge Caching: The Cloudflare Worker proxy caches external third-party API payloads in KV storage, bypassing strict API rate limits and reducing page loads to milliseconds.