Free ROI tracker · CLV analysis · Kelly Criterion · 100% private · no sign-up
Used as the baseline for ROI, drawdown, and all strategy simulations.
How your bets would have played out from a $1,000 start.
Helps identify if you win more at underdog or favourite odds.
Most bettors lose money not because they pick badly, but because they have no system. This free sports betting tracker gives you the same analytical tools used by professional sharp bettors — without spreadsheets, subscriptions, or sharing your data with anyone.
Log every wager, measure Closing Line Value (CLV), calculate your true betting ROI, and simulate how three proven staking strategies would have handled your exact same bets. Your data never leaves your device — it lives in your browser's localStorage, fully private.
The tracker simulates three common staking plan strategies on your historical bets, letting you see which approach would have been most profitable given your exact record:
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CLV measures whether your bet was placed at better odds than where the market settled (the closing line). A consistently positive CLV is the strongest predictor of long-term profitability — it proves you are identifying value before the market corrects.
ROI = (Total Profit ÷ Total Amount Staked) × 100. This tracker calculates it automatically, excluding push/void bets from the denominator for accuracy. A +5% ROI over 100+ bets is considered very strong.
Yield and ROI share the same formula — (Net Profit / Total Staked) × 100 — but yield is the preferred term among European and professional bettors. It focuses on long-term efficiency per unit staked. A sustained yield above +5% over 200+ bets indicates a genuine, repeatable edge. This tracker displays both side by side in the dashboard.
Maximum Drawdown is the largest peak-to-trough drop in your bankroll. For example, if your bankroll grew to $1,400 then fell to $980, your max drawdown was −30%. It is a key risk metric — a profitable bettor with a low drawdown has a more sustainable, psychologically manageable strategy than one with volatile swings.
Kelly formula: f = (b × p − q) / b, where b = decimal odds − 1, p = your estimated win probability, and q = 1 − p. The result is the optimal fraction of your bankroll to bet. This tracker caps Kelly at 25% per bet to prevent catastrophic losses from overconfident estimates.
Yes. Go to Settings and toggle the display to Units (u) mode. You can set your unit size (e.g. 1 unit = $100). All stats, stakes, profits, and suggested stake recommendations will instantly switch to unit format — the standard used by professional bettors and tipster communities worldwide.
Yes. In the Ledger section, use Export CSV to download a spreadsheet-compatible file, or Export JSON for a full backup of all your data. To restore or migrate, click Import and select either a JSON backup or a CSV file. This lets you switch devices, clear your browser, or share your record without losing any history.
Yes, completely. All your data is stored exclusively in your browser's localStorage and never sent to any server. Use the built-in JSON export to create backups you can re-import at any time on any device.
Yes. Enter American odds (e.g. -110, +150) or decimal odds (e.g. 1.90, 2.50) — the tracker auto-detects and normalises both formats for all CLV, profit, and strategy calculations.