This is kind of a weird little app, but it looks like you can customize it in a lot of ways. I could see it working as a dietary tool (tracking fasting) or for workouts or for some other habit you are working on developing.

The main reason I noticed it is that it seems very flexible. It's not really pretty, but could be quite useful.

There is something in the menu about "credits" and I didn't figure out what that was about. It has an anon login or login via nostr browser extension.