Ask HN: What do you want in a habit tracker?

I built a habit tracker https://flathabits.com to scratch an itch. I really wanted to do the right thing for the users. The driving principles were as follows:

- Privacy. These are your personal habits (and they stay on your phone). I want zero access to your data.

- Minimal friction. Habit tracking requires dedication, so it should require almost no effort to stay on top of it.

- No gimmicks. Really, no games, prizes, etc. Just want to build an effective tool.

- No lock-in. Your data is yours. It is saved locally to a text file you can inspect or export at any time.

- No sign-up or account. There really is no need for it. Period.

- No social. Social really just gets in the way. These are your habits, focus on them.

- No analytics. None of any kind. If you like the app or there's a bug, just report it.

- Text-based. Not that it matters to many users, but all data is stored to a text file in org mode.

I've used the app thoroghly and managed to rack up a decent year and a half of continuous running and meditation amongst other habits. The app has 114 ratings (across all countries) with a 4.8 score. But, the app hasn're really picked up many users (1-5 daily downloads) even as a free app.

So, what is this habit tracker missing? What do you actually want in a habit tracker?