OK — been using this thing for maybe six months now and I keep coming back, reckon I'd chuck my thoughts in since a lad on another thread asked me last week. Am based in the UK, mainly do football and horses, nothing mad, so take it how you like.
The reason I started using it was genuinely embarrassing — I never could work out what an each way return would be once you get five places instead of three. I used to just wing it and then be surprised. Now punch the numbers in first, every time, even a simple single bet.
The single bet calculator tool is the bit I'm on daily — you drop in the price and your stake and it shows the return instantly, fractions or decimals. Same tool covers the bigger stuff — acca and treble returns, a lucky 15, patents and yankees, which is where I'd always mess it up. If you fancy a poke about, it's here super heinz kalkulátor — free, no signup.
One thing that genuinely changed how I bet was the nerdier tools. They've got an probability converter that shows how much the bookie's taking, and a kelly staking tool — I stick to fractional kelly because full kelly is far too aggressive. The dutching one is handy too when I'm spreading across selections.
It's not perfect mind. The design is very functional, let's say — zero frills, which honestly I don't mind but some will. Phone-wise it's usable although the acca grid need a bit of scrolling. And nothing on the app store, it's a website and that's it — doesn't bother me but you asked.
Anyway. Doesn't cost anything, no ads shoved in your face, does the job. If anyone still adds it up in their head, have a look — it's saved me plenty of "wait, that's it?" moments.