A habit tool is anything you use to track, measure, or maintain a health behavior.
Examples: smartwatch or fitness tracker (Apple Watch, Garmin, Fitbit), habit tracker app (Streaks, Habitify, Notion), streak counter, macro or calorie tracker (MyFitnessPal, Cronometer), ring-closing app, sleep score app (Oura, WHOOP), morning routine checklist, journaling app.
Pick one tool you are currently using. Run this diagnostic on it. If you use several, run it once for each.