Prime: Fitness Age

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.