Forfeit is a new (2023), hardcore app that takes your money if you don't complete your habits. You must send either photo or timelapse evidence, which they verify, or you lose money.
There are many integrations coming soon, such as friend verify, Apple Health, Strava, Anki, group forfeits, GPS check-ins.
It's a drastic measure, but Forfeit is a pretty much bulletproof way to force yourself to do whatever you want to do. If you set a Forfeit, you can't get out of it, so you can force your future self to listen to your current self.
Forfeit is a free to download app. To participate in the habit contracts, you have to link a debit/credit card, and only lose money if you fail the task.
Looking for other habit tracker apps? We've curated the best alternatives to Forfeit Habit Tracker in one neat collection.