The hardest part of building a habit is seeing whether you are actually doing it. The ChrysoKit Habit Tracker gives you a 28-day heatmap that makes consistency obvious at a glance.
Why use it
Most habit apps are subscription-based and store your data on someone else's server. Ours is free, local and private. Your habits never leave your browser.
How to use the Habit Tracker
- Add habits with a name and an optional description.
- Tap each day to mark it complete.
- Watch the 28-day heatmap fill in.
- Export your log as JSON if you want to back it up.
Features worth knowing
Local-only storage
All data lives in your browser. Nothing is sent anywhere.
28-day heatmap
See your consistency at a glance, the same way GitHub shows commits.
Import and export
Back up your log as JSON; restore on another device by importing.
Pro tips
- Pick small, daily habits. 'Read for 10 minutes' is more sustainable than 'read a chapter every day'.
- Two or three habits is plenty to start. Adding more usually means dropping some within a month.
- Export your log weekly. Browser data can be cleared by accident; a backup costs nothing.
Privacy first. The Habit Tracker runs entirely in your browser. Nothing you enter is sent to a server.
Open the Habit Tracker each morning. The streaks you can see are the streaks you keep going.
Open the tool: Habit Tracker →
Ninety days of tracking: what the grid revealed that memory hid
Three months of marking four habits daily produces a dataset, and the dataset disagrees with memory in instructive ways. Memory said reading happened "most nights"; the grid said 14 nights out of 90, clustered in two enthusiastic bursts. Memory said workouts were derailed by busy weeks; the grid showed they were derailed specifically by Thursdays... the day with the late standing meeting... and that any miss of two-plus days predicted a full week off with depressing reliability. The two-day rule is not a slogan; in this dataset it was the single strongest pattern.
The grid also exposed a counterfeit habit: "meditation" was being marked for sessions as short as ninety seconds, a streak preserved by quietly shrinking the definition. The fix was redefining the habit to its minimum honest version (ten minutes) and accepting the uglier, truer grid that followed. A tracker can only be as useful as the definitions feeding it.
Most usefully, the data made interventions targeted instead of motivational. Thursday workouts moved to mornings... problem solved by scheduling, not willpower. Reading attached itself to an existing cue (in bed, phone in another room) and the bursts smoothed into a pattern. None of this was discoverable by feeling; all of it was sitting in 90 days of checkmarks, waiting to be read.