Forfeit

Say what you're going to do, when you're going to do it, and how much money you'll forfeit if you don't do it. Send photo or timelapse evidence of you completing the habit by the time you set, or we take your money.

Eg, I could set it to go to the gym (or meditate for 30 mins, or take a photo of a sent email, or of a max amount of calories on MyFitnessPal) tomorrow at 6am, or lose $30. If I don't send photo evidence in the gym (that we manually approve), I lose $30.