BeHabitual

Yes, and there is no card involved. Everything described on this site is in the free plan while the product is in early access, including all 30 habit slots and the insights. If a paid tier arrives later, accounts created now keep what they already have.

Nothing punitive. The box stays empty, the run ends there, and the monthly percentage drops a little. Nothing chases you. A day a habit is not scheduled for, or a rest day you take, is not a miss and does not end the run.

Yes. Open the month grid and tap any past day. Future days are locked, because a habit tracker you can pre-fill is a to-do list.

No. There are no emails and no notifications. If you need a nudge, an alarm on your phone does that job better, and the tracker stays the place where you record the day.

Archive it. The habit leaves your daily list and every day you logged against it is kept, so your past months still read correctly.

Three to five if you are starting out. The limit is 30, but tracking 20 habits reliably is itself a habit that most people have not built yet. Add more once the first few run without thinking about them.

Only you. Your habits and the days you logged are tied to your account and isolated from every other account. There is no public profile, no sharing feature, and no feed. You can delete a habit and its full history permanently from the habits page at any time.