Log every bet. Auto-calculates units won/lost, hit rate, ROI, and CLV if you have the closing line. Data lives in your browser only - no account, no server, nothing tracked.
You think you're profitable. Your memory lies. Real data shows 95% of bettors lose long-term, and most of them believe they're winning. The only way to find out where you stand - and which sports/bet types make you money - is to log everything and look at the sheet.