AgeRewind turns twenty-six everyday habits into a single number: how old your body is behaving, and how quickly it is getting older. Three minutes, no blood draw.
The model is built on the same variable families used in phenotypic-age research — cardiovascular load, recovery, body composition, and exposure — weighted against a reference curve for your chronological age.
Your biological age and pace-of-aging multiplier, to one decimal.
A ranked breakdown of every marker, priced in years gained or lost.
Four system scores: cardiovascular, metabolic, recovery, musculoskeletal.
Your projected biological age twelve months from now if you act on the top three.
The AgeRewind Protocol is a coaching app that turns your result into a small number of daily actions, and re-measures your aging speed every month.

Habits adjust weekly based on what you actually logged, not a generic 30-day plan.