Log every bet, track your true ROI and win rate by sport and bookmaker. 100% private — stored in your browser, no account needed. Export to CSV anytime.
Studies consistently show that bettors overestimate their win rate by 5-10 percentage points when asked to recall without records. Memory is self-serving — we remember wins more vividly than losses. A bet tracker forces honest accounting and is the foundation of any serious betting operation.
Log: sport, game description, odds, stake, bookmaker, and result. Over time, this database reveals which sports are your edge and which are losing propositions, which books give you the best lines, and your true long-term ROI. Without this data, you're making decisions based on feelings rather than evidence.
ROI = (net profit ÷ total stakes) × 100. A 5% ROI means you profit $5 for every $100 wagered. Professional bettors achieve 3-8% ROI consistently over large samples. If your ROI is negative after 200+ bets, your betting system needs reassessment. If positive, scale up volume while maintaining the same bet selection discipline.
Export your bet history regularly. The CSV file opens in any spreadsheet program, allowing deeper analysis: monthly performance trends, ROI by bet type (spread vs total vs moneyline), and performance by bookmaker. This analysis often reveals opportunities to drop losing bet types and focus resources on edges you've actually proven.
Also in the free toolkit: