Right been using this thing for maybe a few months now and I keep coming back, reckon I'd chuck my thoughts in since someone asked me last week. I'm UK based, mainly stick to footie and the horses, a fiver here and there, for context. The reason I started using it was genuinely pretty stupid I couldn't ever get my head round what an ew payout actually was when the place terms changed. Basically I'd guess and moan when the payout landed. Now stick my stake in before I place anything, even the boring singles. The single bet calculator tool is the part I'm on daily you drop in your stake, the odds and you get returns straight away, fractional or decimal, doesn't matter. Same tool covers the multiples doubles and trebles maths, lucky 15 and lucky 63, yankees, which is where I always got it wrong. If you want a look, it's over at <a href=https://freebet-calculator.com/bet-calculator/super-heinz>heinz calculator</a> and it's free with no account nonsense. One thing that actually shifted things for me were the geekier bits. The implied probability thing which shows you the overround, plus a kelly staking tool I stick to fractional kelly because full kelly is a quick route to a dead bankroll. The dutching one is handy too if I'm covering two or three runners. Not all sunshine though. The interface looks very functional, let's say no frills, it's clearly function over form. On my phone it works though the acca grid are a squeeze. Also there's nothing on the app store, it's browser only slight shame just flagging it. Anyway. Costs nowt, not plastered in adverts, works. If anyone honestly does the maths on paper, try it it's saved me plenty of arguments with the bookie.