Free forever · Private by design

Track your biological age. Understand your health.

See your weekly MyBioAge Index™, daily Recovery and Apple Health trends in one place. My Bio Age keeps your health data private, with a free AI Coach that runs entirely on your iPhone.

No in-app purchases. No subscription. No account required.

Free on the App Store for iPhone with iOS 26 or later. Apple Watch companion included.

  • Health metrics tracked

    Explore health metrics alongside Stress Resilience and Circadian Alignment, with up to 6 months of history

  • AI Coach

    Included free: guided questions about your metrics and weekly changes, with AI running entirely on your iPhone

  • Enhanced trends

    Review 14-day, 3-month, and 6-month charts to put recent changes in context

MyBioAge Index™ combines 12 health inputs, or 14 with blood pressure, into a weekly wellness estimate. Stress Resilience and Circadian Alignment are separate daily scores. This is not a medical or diagnostic test.

What's New

Daily scores. Longer-term trends. Private insights.

Explore Stress Resilience and Circadian Alignment alongside your weekly Index and up to 6 months of health history. All included free, with no in-app purchases. Processing stays on your iPhone.

Stress Resilience Score

A daily wellness score from HRV patterns, recovery, sleep, and activity. Use changes over time as context, not as a measurement of psychological stress.

Circadian Alignment Score

Explore a daily score based on sleep timing and activity patterns. It is a wearable-based estimate, not a direct measurement of your body's internal clock.

On-device AI Coach

Included free. Choose Weekly Summary, Status, Why, or Improve questions about supported metrics. AI runs entirely on your iPhone using locally stored facts, with no health data uploaded for answers.

Recovery & Strain dashboard

Review your Recovery ring and Training Load ratio on iPhone. Tap for contributing signals and trends, then view key scores in the companion Apple Watch app.

Enhanced trend charts

Beautiful zone-colored backgrounds in 14-day, 3-month, and 6-month visualizations. Consistent design across all key metrics with deeper Pace of Aging analysis.

MyBioAge Index™

A weekly wellness estimate based on 12 health inputs, or 14 with blood pressure. It summarizes complete Monday-to-Sunday weeks, with confidence reflecting available data.

Apple Watch with color-coded feedback

See biological age, Recovery, Training Load, Stress Resilience, and Circadian Alignment in the watch app. Refresh while the app is open and your iPhone is reachable; cached values remain available offline.

Privacy-first design

The consumer app processes health data and AI answers on your iPhone. Optional model downloads need internet access; health data is not uploaded for scoring or answers.

Explore the Apple Watch companion, follow the first Index checklist, or learn what to look for in a biological age tracker.

How It Works

Your health history, with context you can follow.

Read available Apple Health data, review your weekly Index, and explore daily scores and guided explanations. Each view uses the history and signals available for that metric.

Our methods page explains the health signals and reference sources behind the app. The MyBioAge Index™ is a wellness estimate, not a clinical assessment.

📥 Collect (available history)

With your permission, My Bio Age reads available Apple Health history from the past 180 days. The app derives scores on your iPhone and shows up to 24 complete weeks of Index history.

  • Available weekly Index history supports Pace of Aging trend analysis.
  • Stress Resilience is a daily wellness estimate based on available health signals.
  • Circadian Alignment summarizes patterns in sleep and activity timing.
Dive into Methods & Sources
🧮 Score (week by week)

MyBioAge Index™ combines 12 health inputs, or 14 with blood pressure, into a weekly wellness estimate. Recovery and Training Load provide separate daily views. Stress Resilience and Circadian Alignment are not Index inputs.

  • The Index uses completed Monday-to-Sunday weeks. Open the app to refresh available Health data.
  • Pace of Aging summarizes changes across your available weekly Index history.
  • Color-coded zones (green/yellow/red) across all metrics for instant feedback.
Dive into Methods & Sources
🤖 Explain (smarter AI Coach)

Choose a Weekly Summary or a guided Status, Why, or Improve question for a supported metric. The free AI Coach runs entirely on your iPhone using local health facts; it does not provide diagnosis or medical advice.

  • Select a metric such as HRV, Stress Resilience, or Circadian Alignment to explore its context.
  • Beautiful zone-colored backgrounds in 14-day, 3-month, and 6-month trend visualizations.
  • Consistent design across all metrics with enhanced visual feedback on Apple Watch.
Dive into Methods & Sources

In-app preview

Designed for quick reads and deep dives.

The dashboard, Index details, and Weekly Digest keep your MyBioAge Index™ and health metrics easy to scan on iPhone. The companion watch app shows key scores.

MyBioAge Index dashboard with VO₂max and HRV trends
MyBioAge Index dashboard with VO₂max and HRV trends
MyBioAge Index details with confidence and Pace of Aging
MyBioAge Index details with confidence and Pace of Aging
Weekly Digest with Index changes and seven-day metric averages
Weekly Digest with Index changes and seven-day metric averages
Latest articles

New in health tech. Next for My Bio Age.

A closer look at wearable health, practical guides to your data, and previews of the features we’re building.

View all articles

A closer look at the sleep, AI Coach and workout recovery changes in My Bio Age 1.0.22, available on the App Store.

Published Updated

A blood test records things your watch can’t. Here is how PhenoAge turns nine routine results into an age-like estimate, and how to read it calmly.

Published Updated

Recovery needs a recent heart-rate recovery reading, and Apple Health doesn’t always have one. Here’s how the planned cooldown estimate works, and where it stops.

Questions

Answers before you even download.

If you don’t see your question, reach out via the contact form. We listen.

Completely free. Completely on your terms.

Your health has a story. See it on your iPhone.

Download My Bio Age to explore your weekly MyBioAge Index™, daily Recovery and Apple Health trends. Your health data stays private, with scoring and optional AI answers processed entirely on your iPhone.

Free to download and use. No in-app purchases. No subscription.

iPhone with iOS 26 or later · Apple Watch companion included · No account required

Need a hand? Contact support.

Contact us

Questions, partnerships, or press? We’d love to chat.

We typically respond within two business days.

Email us at [email protected].