I’m working on ProofLeague, an app for keeping workout promises with friends:

https://proofleague.com (iOS, web app and android)

You create a private league, set a weekly goal (workout 3x a week), and tap Start when you begin a workout. Friends get notified and then have 30 minutes to ask for a selfie. If nobody asks, the workout counts automatically. There’s no public feed or strangers involved, just a small group keeping each other honest.

My friends and I had been doing a version of this via text message for years, but this app has been great. I am in 4 "leagues", all of them get notified at once and then I only share my selfie once and it automatically goes to any group that asks. It's motivating and hilarious to see people working out.

It's free and would love for you guys to try it and set up a league with friends or family. Please send me any feedback at [email protected]