Recovery
Sleep, HRV, resting heart rate, respiratory stability, and the signals that show how supported your body looks.
Prime for iPhone
Your health signals, made clear.
Prime turns the Apple Health data you choose to share into a private wellness estimate—so you can see your current Prime Age, understand what moved, and follow your trend.
On-device
No account
No tracking
Apple Health
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Prime Age
One score, explained
Know what your body is showing now.
Prime organizes your available signals into three clear drivers without treating missing data as failure.
Strain
Movement, workouts, physical effort, and the recent demand your body has been carrying.
Capacity
Cardio fitness, strength work, mobility, and longer-term signals of what your body can do.
Private by design
Your health data stays yours.
Prime is local-first. You choose the Apple Health categories it can read, and you can revoke access whenever you want.
Calculated on your iPhone
Prime processes authorized health signals on-device.
No account or backend
Your score does not depend on a Prime cloud account.
No advertising or tracking
Prime does not sell health information or use it for advertising.
Wellness, not diagnosis
Prime Age is a personal wellness estimate, not medical advice or a clinical biological-age test.