1. Set your start date. Everything else calculates from it — your day count, the 90-day grid, milestone dates, weekly ranges.
2. Pick 3–5 daily non-negotiables. Tick them off each day in the Today panel. Missed a day? Click that square in the 90-day grid and backfill it.
3. Review every Sunday. Open that week's card, write what moved and what didn't, score it out of 10. Twenty minutes. This is the habit that keeps the sprint alive.
4. Hit Save often. The tracker remembers your progress in this browser automatically, but browsers clear their storage sometimes. Clicking Save downloads a small backup file. Use Load to bring it back, move it to another computer, or pick up where you left off after clearing your browser.
This demo is the full tracker, loaded with someone else's sprint. Get your own copy and the first thing you'll do is wipe this and set your own date.