FOS
Full of Shit
Practice investing with fake money.
No sign-up. No real risk. Just learning.
A free, open-source paper trading app that runs entirely in your browser. Track 50+ stocks, compare broker fees, and see what your portfolio would be worth.
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Paper Trading
Start with fake money. Buy and sell real stocks. See what your portfolio would actually be worth.
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Live Prices
Real market data via Yahoo Finance. Falls back to demo data offline. 15-minute cache.
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Conviction Tracker
Record why you picked each stock. Get gentle check-ins asking if you still believe.
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Risk Quadrant
Visualise your holdings on a risk vs. time horizon map. See where your money actually sits.
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Broker Comparison
See what your trades would cost at 8 real UK brokers. Find the cheapest option for you.
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Spreadsheet Mode
Download Excel dashboards with formulas, charts, and broker fee calculators. Open in Google Sheets.
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100% Private
Everything stored in your browser. No accounts, no tracking, no server. Your data stays yours.
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Anti-Shame Design
Gentle messaging throughout. No judgment. Escape routes on every screen. Learning, not pressure.