Monthly Habit Tracker

No. Projects remain temporary until you download JSON or choose Save in this browser. Browser saves are restored only when you click Load browser save. Later edits need another Save.

Up to 20 habits and 12 months containing marks. Empty months are omitted, so viewing another month does not consume an allowance. Dates run from 1900–2100.

Targets are0–31 marked days and are capped to the selected month’s day count.0 means no target. Labels and targets apply to all months in the project. Marks are your choices, not a measured behavior or health score.

Yes. Up to 50 temporary project changes can be undone, including habit removal, target/name edits, day marks, month changes, example loading and project replacement. Undo does not change an already saved browser copy.

Other project months and habits remain. The empty month stops counting toward the 12-month limit. Undo can restore its marks.

Download project JSON, transfer the file yourself and import it on the other device. No account, cloud synchronization or background connection is provided.

One selected month, with an ISO date column and a column for each habit.1 means marked,0 unmarked. Formula-like habit headers may receive an apostrophe for spreadsheet protection. JSON preserves literal names and all project months.

The grid scrolls horizontally within its panel. The habit column and date headers remain visible. Each mark is a keyboard-focusable button and focus stays on the changed day.

The gold date outline uses the device’s current local date. It is a visual reference; users can mark any valid project date manually.

No processing upload is needed. Optional browser storage belongs to this website. Projects are not synchronized or automatically saved. Website ads and analytics follow the privacy information.