OK — have been messing about with this thing for maybe six months now and I keep coming back, reckon I'd say something since a lad on another thread asked me the other day. Am in the UK, generally stick to footie and the horses, small stakes, so take it how you like. The reason I started using it was genuinely pretty stupid — I couldn't ever figure out what an e/w return actually was with 1/5 odds a place. I used to just eyeball it and then be surprised. These days I punch the numbers in first, every time, even a simple single bet. Their single bet calculator is the part I use most — you put in your stake, the odds and you get returns with no faffing, fractional or decimal, doesn't matter. It also handles the fiddly ones — acca and treble returns, lucky 15s, patents and yankees, which is where I always mess it up. If you fancy a poke about, it lives at lucky 63 bet and there's no login wall, which I appreciated. What actually changed how I bet were the nerdier bits. There's an probability calculator that shows what margin's baked in, plus a kelly criterion calculator — I use half kelly as the full version is a quick route to a dead bankroll. Dutching calculator gets used a fair bit when I'm spreading across selections. Couple of gripes. Its layout is a bit basic — zero polish, which honestly I don't mind but some will. Phone-wise it works but the acca grid make you pinch and zoom. And no app, it's browser only — fine by me but you asked. So yeah. Free, no ads shoved in your face, works. If you honestly adds it up in their head, try it — saved me plenty of "wait, that's it?" moments.