First you set a goal for how many days you'll hit the gym. To prove you're at the gym, you will verify each visit by pressing a button on your phone (with location sharing on). You stake $10 as motivation and if you hit your target, you get the money back. If you fail, your $10 goes to the "Save The Children" charity with a donation receipt emailed to you.
Obviously you could visit the gym and then just go home without working out - but getting to the gym is half the battle!
It's simple to use with a Google sign-in and hopefully it will encourage some people to workout (or give to charity)!
