Add up to 5 habits you want to keep, then tap the pixel for each day you did it. Every habit gets its own one-year grid (today plus the previous 365 days), like the GitHub contribution chart. It follows the same idea as Habit Pixel and similar habit apps, rebuilt as a browser tool that needs no sign-up. Your current streak, days done this month and this month’s completion rate update instantly. Data is stored only in this browser (localStorage) and never sent anywhere; use “Export JSON” and “Import JSON” to move it to another device.
How it counts: “Streak” is the number of consecutive marked days ending today (or yesterday, if today is not marked yet). “Month rate” is days done this month divided by the days elapsed so far this month. Everything is saved only in this browser’s localStorage, so clearing site data or using a private window will erase it; export a JSON backup for anything you care about.