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Live portfolio overview across stocks, crypto, and margin/perps. Your keys never leave your browser. 4tune pulls your balances, fees, and profit from every trading and exchange account you actually use into one view — Trading 212, Alpaca, Binance, Kraken, and Kraken Futures — without ever sending your keys anywhere but the platforms themselves. WHAT IT DOES • See your total across every connected platform, broken out by allocation, in the currency you think in • Track real fees pulled from your actual trade history — not estimated, not remembered • Watch a real performance trend over time, with a simple projection clearly marked as an estimate, never dressed up as a forecast • Export your trade history, current holdings, or full net worth timeline to CSV whenever you want • Works in light or dark mode, with a full dashboard view alongside the compact popup YOUR KEYS NEVER LEAVE YOUR BROWSER 4tune has no server, no database, and no accounts of its own. Everything — your API keys, cached balances, preferences — is stored only in Chrome's own local storage, on your device. Requests go directly from your browser to each platform's own servers, using a key you control. 4tune is strictly a viewer: it never places a trade, never moves funds, and never requests any permission beyond what's needed to read your account data. WHO IT'S FOR Anyone with money spread across more than one trading or crypto platform who's tired of checking five apps to answer "how am I doing today." Full setup guide, Privacy Policy, and Terms of Service linked from the extension itself.