Right — been using this thing for maybe five months now and it's basically bookmarked at this point, reckon I'd say something since a mate asked me the other day. I'm in the UK, generally bet football and racing, nothing mad, for context. The reason I started using it was genuinely pretty stupid — I could never get my head round what an each way payout would be with 1/5 odds a place. I used to just wing it and moan when the payout landed. Now I stick my stake in before I place anything, even the boring singles. The single bet calculator is the part I'm on daily — you drop in stake and odds and you get returns straight away, fractional or decimal, doesn't matter. There's also the multiples — trebles returns, lucky 15s, a yankee, honestly that's where most people I know mess it up. Have a go yourself, it lives at matched betting oddsmatcher free — free, no signup. One thing that genuinely changed how I bet is the geekier bits. There's an implied probability thing which shows you how much the bookie's taking, and a kelly staking tool — I use half kelly as the full version is terrifying. Dutching calculator is handy too when I'm covering two or three runners. Couple of gripes. Its design is a bit basic — not much polish, it's clearly function over form. On mobile it's usable but the acca grid need a bit of scrolling. And no app, it's a website and that's it — doesn't bother me just flagging it. Right, that's me. Doesn't cost anything, barely any ads, works. Anyone who even now does the maths on paper, give it a go — it's saved me a load of arguments with the bookie.