Buy Airtight — Private Portfolio Tracker

What it does

A single HTML file that tracks your entire portfolio — crypto, stocks, ETFs — from CSV exports. No account. No cloud. No API keys. FIFO cost basis, live prices, holdings dashboard. Your financial data never leaves your machine. $29 once, not a subscription.

Airtight — Private Portfolio Tracker can now be bought on SellApp

Know what you own . Keep it to yourself. Airtight is a privacy-first crypto portfolio tracker that runs entirely in your browser. Your trades, your balances, your profit-and-loss — it all stays on your device. No cloud accounts. No analytics. No telemetry. Just you and your numbers. Why Airtight? Most portfolio trackers want you to create an account, sync your exchange via API, and trust them with your financial data. Airtight doesn't. It's a single HTML file. You open it locally, import your trades, and get a professional-grade portfolio dashboard — without ever sending a byte of your data anywhere. - Multi-exchange import — drop in CSVs from 70+ exchanges and wallets. Coinbase, Binance,…from airtight.sell.app

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