gist
Know your biological age
Your chronological age is just a number. Gist analyzes your Apple Health data to reveal how fast your body is actually aging.
Coming Soon to App StoreWhat Gist Does
A minimal app that turns your health data into actionable insights about aging.
Biological Age
Calculate your true age based on 30+ health metrics synced to Apple Health.
Pace of Aging
Track whether you're aging faster or slower than normal with real-time insights.
Health Insights
Understand how your sleep, activity, heart health, and body metrics impact your aging.
How It Works
Gist analyzes 30+ health metrics from Apple Health, comparing them against research-backed optimal ranges to calculate your biological age.
Sleep
Quality rest is foundational to cellular repair and longevity.
Activity
Regular movement keeps your cardiovascular system young.
Heart
Heart rate variability is one of the strongest predictors of biological age.
Body
Physical fitness markers that correlate with longevity.
The Calculation
Score Each Metric
Each health metric is scored 0-100 based on how close it is to the optimal range. For example, 7-9 hours of sleep scores 100, while less or more reduces your score.
Weight by Importance
Not all metrics are equal. HRV and VO2 Max carry more weight than step count because they're stronger predictors of longevity.
Calculate Age Offset
Your overall score determines your age offset. A score of 50 means no offset. Higher scores subtract years (up to -10), lower scores add years (up to +10).
Track Your Pace
Gist also calculates your pace of aging—whether you're aging slower than normal, at the normal rate, or accelerating. This helps you see the impact of lifestyle changes over time.
The Formula
Gist Age = Chronological Age + (50 - Score) / 5
Score 70 → 4 years younger • Score 30 → 4 years older