A score should never be a black box.
daygauge is built around one rule: every Life Index change needs a clear reason, a baseline comparison and a confidence label.
What affects the Life Index.
Sleep timing
Sleep duration, sleep midpoint, wake consistency and how far today moved from your normal rhythm.
Movement spread
Steps, active minutes and whether movement was spread through the day or compressed into one burst.
Recovery proxy
HRV, resting heart rate and sleep context, weighted cautiously when readings are noisy or missing.
Consistency
Repeated useful behaviour across the week. daygauge rewards rhythm more than extremes.
Balance
High-output days can be capped when recovery signals look strained, reducing overtraining incentives.
Place patterns
Coarse routines such as home, office, gym, cafe and transit windows, never exact routes or addresses.
Every score movement needs evidence.
Not every interesting topic should change the score.
Missing data lowers certainty, not honesty.
Research context only. daygauge does not diagnose, treat, prevent or predict disease risk.