Free tools
Math & proof utilities — no signup
Calculators and checklists for cappers logging units and buyers judging tipsters. Runs in your browser. When you want a locked public track record, start a free trial.
Cappers & buyers
EV & Kelly
Convert American odds, see implied probability, expected value, and a half-Kelly stake suggestion.
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For cappers
ROI calculator
Paste wins and losses with odds and stake. Get net profit, yield, ROI, and win rate — no spreadsheet.
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For buyers
Tipster checklist
Score a pick seller before you pay: open picks, sample size, locked losses, and screenshot theater.
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Also see FAQs, Blog, and live demo. Educational tools only · not betting advice · 18+.