Weekly digests with reasons for change. Private by design.
Highlights
My Bio Age translates raw Apple Health data into stories you can act on.
Based on your VO₂max from Apple Health, compared with age- and sex-matched reference standards.
Combines HRV, Resting HR, Heart-Rate Recovery, Walking HR, and Sleep for a fuller picture.
Every 7 days, see what changed—positive or negative—and why.
Beautiful trends for every metric we track.
Check ages at a glance and add a complication.
On-device scoring by default; you control what’s shared.
Methodology
Compare your cardio fitness and recovery metrics to evidence-backed population studies. When you want full detail, the Methods page has the data sources.
Your VO₂max percentile is mapped to the age of someone with the same cardio fitness. Higher VO₂max, younger Fitness Age.
We blend HRV, Resting HR, Heart-Rate Recovery, Walking HR, and Sleep quality to estimate stress and recovery, then translate that into an age scale.
In-app preview
From your wrist or your iPhone, My Bio Age keeps your metrics in reach without noise.
Questions
If you don’t see your question, reach out via the contact form. We listen.
Contact us
We typically respond within two business days. Share as much detail as you’d like.
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Fitness Age and Biological Age update weekly, with full privacy controls. Have questions? Reach out anytime.