Right — been on this thing for something like five months now and I keep coming back, reckon I'd chuck my thoughts in since someone asked me a few days back. Am based in the UK, mostly do football and horses, nothing mad, for context. What got me on it was genuinely embarrassing — I never could get my head round what an e/w payout actually was with 1/5 odds a place. I'd just guess and get a shock. Now I type the odds in before I place anything, even the boring singles. Their single bet calculator tool is the part I'm on daily — you put in the price and your stake and it shows returns straight away, fractional or decimal, doesn't matter. There's also the fiddly ones — acca and treble maths, lucky 15s, a yankee, honestly that's where I'd always lose track. If you want a look, it's here [url=https://singlebettingcalculator.uk/bet-calculator/betting-margin]overround calculator[/url] — free, no signup. What actually shifted things for me was the geekier extras. They've got an probability converter that shows the overround, plus a kelly staking tool — I stick to fractional kelly since full stakes are far too aggressive. The dutch tool is decent when I'm spreading across selections. Not all sunshine though. Its design is very functional, let's say — no polish, it's clearly function over form. On mobile it's usable though the lucky 63 breakdown are a squeeze. Also there's no app, it's a website and that's it — doesn't bother me just flagging it. Right, that's me. Free, no ads shoved in your face, works. If you even now adds it up in their head, have a look — saves me plenty of arguments with the bookie.