Prime: Fitness Age

Turn Apple Health signals into a clear Prime Age, see what is driving it, and track whether your weekly trend is moving younger.

Prime turns the Apple Health data you choose to share into a clear, wellness-oriented estimate called Prime Age.

See your current Prime Age, understand which signals are supporting or dragging it, and follow whether your trend is improving over time.

PRIME AGE

• Compare your current wellness signals with your chronological age.
• See an honest confidence level based on data coverage and recency.
• Understand that missing signals reduce confidence rather than count against you.

KNOW WHAT MOVED

• Recovery explains sleep, HRV, resting heart rate, and stability.
• Strain shows the demand carried through activity and training.
• Capacity reflects cardio fitness, strength, and longer-term ability.

FOLLOW YOUR TREND

• Track Aging Pace against your recent baseline.
• Review local score history, weekly change, best score, and streaks.
• Share your Prime Age hero and weekly proof as polished images.

PRIVATE BY DESIGN

• You choose which Apple Health categories Prime can read.
• Prime processes your score on your device.
• Score history stays on your device.
• No account is required.

Prime Age is a personal wellness estimate. It is not a medical diagnosis, treatment recommendation, disease prediction, or clinically validated biological-age test.