Bankroll & ROI Tracker
Log every bet, see your real numbers. Stake, odds, result — get profit, ROI %, hit rate, average odds, longest streak. 100% browser-based, your data is saved locally and never leaves your device.
| # | Date | Bet (label) | Stake | Odds | Result | P/L |
|---|
Why track every bet?
- Memory lies. You remember the wins, you forget the losses. The CSV doesn't.
- ROI > "I'm up". Up €200 on €5,000 staked is +4% (good). Up €200 on €50,000 staked is +0.4% (you're losing to the vig).
- Tier breakdown tells you where your edge actually is — favourites? Underdogs? Specific tour?
- Variance discipline. Long losing streaks happen to +EV bettors. Without a log you can't tell variance from a leak.
FAQ
Is my bet data uploaded anywhere?
No. Everything is stored in your browser's localStorage. Clearing your browser cache will wipe it. Use Export CSV regularly to back up.
What's a "good" ROI in sports betting?
+3% to +8% over 1000+ bets is professional level. +10%+ usually means small sample, recreational bookmaker accounts, or a hot streak. Anything below 0% means you're paying the vig. The market average ROI for retail bettors is around -5%.
Should I count void bets in ROI?
This tracker treats Void as 0 stake / 0 profit (excluded from ROI denominator). That's the industry standard — a voided bet was returned, so it shouldn't drag your numbers up or down.
Can I import bets from a CSV?
Not yet — coming in v2. For now you can edit the visible CSV column-by-column or paste rows manually.
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