How the Nudge wellness score works
What is the wellness score?
Every day, Nudge computes a single score from 0 to 100 for that day, built from five drivers that together add up to 100 points. It's shown on the home screen as soon as the Accessibility service is turned on — it isn't hidden while the app learns your habits. Instead, any driver that needs history it doesn't have yet (see "Calibration" below) falls back to a neutral, non-penalising value until that history exists, rather than showing nothing.
What are the five drivers?
- Scroll Volume (0–30 points) — how today's total scroll count compares to your own trailing 7-day average. Scrolling at or below your usual pace scores highest; scrolling well above it scores lowest.
- Session Behaviour (0–20 points) — your average phone session length today and your single longest session, each scored independently; shorter sessions score higher. Time spent on calls or video calls is excluded from session length.
- Unlock Frequency (0–15 points) — how many times you unlocked your phone today; fewer unlocks scores higher.
- Time Hygiene (0–20 points) — a combination of how late your last unlock was (checking in the middle of the night scores lowest), how long your phone went untouched overnight, and how close today's first unlock was to your own usual time.
- App Quality (0–15 points) — based on the single app you scrolled in most today. Nudge classifies apps into productive, long-form, mixed, passive-social, and short-form-video categories, each worth different points, using a small built-in list of well-known short-form/social apps plus a handful of recognised productivity apps; anything else is scored as mixed.
What are the five tiers?
The total score (0–100) maps to one of five tiers:
- 🌿 Mindful — score 85 and above
- ✨ Balanced — score 70–84
- 🌊 Drifting — score 50–69
- ⚡ Heavy Use — score 30–49
- 🔴 Overloaded — score below 30
What is the calibration period?
Two of the drivers need a bit of your own history to be meaningful: Scroll Volume needs a full 7-day average to compare today against, and the first-unlock-consistency part of Time Hygiene needs at least 3 days of prior first-unlock times. Until that history exists, Nudge gives full or neutral credit for that part rather than guessing or penalising you — the home screen labels this explicitly (e.g. "Learning your baseline (needs 7 days)") so it's clear the score isn't yet comparing you against a real baseline.