Pledge how many days a week you'll work out (1–7) and put $10–$100 per missed day on the line. Workouts verify automatically through Apple Health — walks, lifting, yoga, pickleball all stack toward 30 minutes a day, no check-ins or selfies. Hit your goal and you're charged nothing; the penalties from everyone who missed are split among the winners as points you can redeem for Amazon gift cards or donate to a nonprofit. Rolling weekly pledges you can start any day. Live on iOS.
