Right — have been messing about with this thing for something like five months now and I keep coming back, so thought I'd say something since someone asked me the other day. I'm based in the UK, mainly stick to footie and the horses, a fiver here and there, for context.
The reason I started using it was actually a bit daft — I never could figure out what an ew payout would be when the place terms changed. I used to just wing it and get a shock. Now I type the odds in before I place anything, even a simple single bet.
Their single bet calculator tool is the bit I'm on daily — type in stake and odds and you get the return instantly, fractional or decimal, doesn't matter. Same tool covers the multiples — trebles returns, lucky 15s, a yankee, which is where I always mess it up. Have a go yourself, it lives at matched bets calculator — free, no signup.
The thing that really changed how I bet was the more serious bits. They've got an probability calculator which shows you how much the bookie's taking, plus a kelly criterion tool — I run quarter kelly because full kelly is far too aggressive. The dutching one is decent for when I'm spreading across selections.
Not all sunshine though. The design feels a bit basic — zero flash, looks like it was built by someone who cares more about maths than colours. Phone-wise it's usable although the bigger tables are a squeeze. There's nothing on the app store, it's browser only — fine by me but you asked.
So yeah. Costs nowt, no ads shoved in your face, works. If you honestly works out returns on a calculator app, try it — it's saved me a fair few dumb bets I'd have regretted.