One day. Then another.

A daily check-in and a clear record of showing up.

App Store

iPhone · iPad2026

Inside the project

Choose a routine and mark each day done, missed, or skipped. TwentyOne supports a 21-day challenge, flexible streaks, and open-ended habits. A simple grid keeps your history visible, and you can correct a past day when you need to.

01
Choose a challenge, a streak, or an ongoing routine.
02
Check in with one tap, skip a day, or edit a past entry.
03
Keep a habit close with home and lock screen widgets.

A closer look

TwentyOne — See the days add up — 03See the days add up

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