Zeitwell

Zeitwell reads the Health data your iPhone and Apple Watch already collect and turns it into one directional number — your biological age — then into a daily routine you can actually follow. FREE, AND IT STAYS THAT WAY No subscription, no paywalled features, no account. The whole app is free. NOTHING LEAVES YOUR IPHONE There is no server and no account, because there is nowhere for your data to go. Your sleep, heart rate and biological age are read on-device and stay there. The coach runs on Apple Intelligence, on your phone. SEE THE NUMBER Your biological age, scored from up to 9 weighted signals — VO2 max, HRV, resting heart rate, sleep duration and regularity, daily movement, diet quality, meal timing and circadian alignment. It shows a range, not a point, and always states how many signals it used, so you know what the number rests on. TALK IT THROUGH An on-device coach that reasons…