Habit Tracker

Add up to ten habits, and each day tap the ones you did. The calendar view shows a coloured square per day, and the counter shows the current streak and the longest streak for each habit. Everything is stored in this browser on this device; nothing is uploaded and no account is needed. It is deliberately minimal: the research on habit formation suggests that the act of recording is what matters, and that apps with points, badges and reminders add friction more often than motivation.

• Attach it to an existing routine. "After I pour my morning coffee, I do two minutes of stretching." Habits anchored to a cue that already happens every day form far faster than ones tied to a time of day.
• Make it small enough to do on a bad day. The habit is "put on running shoes and go outside", not "run 5 km". On good days you do more; on bad days you keep the streak.
• Track it immediately. Tick the box right after doing the thing, while the small satisfaction is fresh. That is the reward that builds the loop.
• Expect about two months. A well-known study found habits took a median of 66 days to become automatic, with a range from 18 to 254. Plan for the median.
• Never miss twice. One missed day makes no difference to the long-term outcome; two in a row starts a new pattern. Missing a day resets the streak counter here, but the calendar still shows the month, which is the more honest picture.