Fitsby is an app that motivates you to work out.
Fitsby is a free mobile app that motivates people to work out. Users can challenge their friends to a game of gym check-ins and win by reaching their gym goal. When the game ends, the gym goers who reached their goals are rewarded money from their friends who didn't. Fitsby uses users' smartphone GPS to verify that they are at a gym and also requires that they work out a minimum of 30 minutes before they can successfully check out.