My Bio AgeMy Bio Age
🆕 Stress Resilience • Circadian Alignment • 6 months of data

Ask your health data anything. Keep your biological age trending younger.

The MyBioAge Index™ now analyzes 6 months of health data—including new Stress Resilience and Circadian Alignment scores—for more accurate biological age calculations. An on-device AI coach explains trends across 14 metrics, while enhanced visualizations keep you on track.

Download on theApp StoreExplore AI assistant
Health metrics tracked
14 metrics including Stress Resilience & Circadian Alignment, with 6 months of history
AI Coach
Ask about any metric—stress, circadian rhythm, trends—with 6 months of context
Enhanced trends
Zone-colored 14-day, 3-month, and 6-month visualizations with refined accuracy

MyBioAge Index™ combines 14 scientifically-weighted signals—VO₂max, HRV, Recovery Capacity, Sleep, Stress Resilience, Circadian Alignment, and more—using 6 months of data and your exact birth date for precise biological age calculations.

My Bio Age app showing Fitness Age and Biological Age charts

What's New

Two new metrics. Six months of data. Smarter insights.

Stress Resilience and Circadian Alignment scores join 6 months of health history—all analyzed on-device for deeper, more accurate biological age insights.

Stress Resilience Score

Understand how well your body handles stress (0-100). We analyze HRV patterns, recovery trends, sleep quality, and activity balance to reveal your stress adaptation capacity.

Circadian Alignment Score

Discover how well your daily rhythms sync with your body's natural clock (0-100). Track sleep timing, wake patterns, and activity timing to optimize your circadian health.

Smarter AI Coach with 6 months of data

Ask about Stress Resilience, Circadian Alignment, or any metric. The AI now understands 6 months of your health history for richer, more accurate conversations—all on-device.

Recovery & Strain dashboard

Streamlined two-metric view: Recovery ring with 4-signal breakdown plus Training Load zone bar with color-coded zones. Tap for detailed Recovery Signals and Strain Signals on iPhone and Apple Watch.

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™

Blends 14 scientifically-weighted health signals—including new Stress Resilience and Circadian Alignment—into a single biological age score using your exact birth date for precision.

Apple Watch with color-coded feedback

All four key metrics now on your wrist with green/yellow/red status indicators. Instant feedback on biological age, recovery, stress resilience, and circadian alignment.

Privacy-first design

6 months of data stays on your device. Zero servers, zero cloud storage, zero analytics. You control everything with granular Health permissions.

How It Works

Six months of data. Fourteen metrics. One precise score.

Every insight comes from 6 months of HealthKit data, scored locally with new Stress Resilience and Circadian Alignment metrics. Deeper history means more stable, accurate biological age calculations.

Sources include FRIEND cardio fitness reference standards, circadian rhythm research, stress physiology studies, and peer-reviewed recovery science.

📥 Collect (6 months of data)

We now analyze 6 months (24 weeks) of your health data from Apple Health—VO₂max, HRV, Recovery Capacity, Stress Resilience, Circadian Alignment, Sleep, and more—for more stable and accurate biological age calculations.

  • 6-month history enables enhanced Pace of Aging analysis across multiple time horizons.
  • New Stress Resilience Score (0-100) measures how well your body handles and recovers from stress.
  • New Circadian Alignment Score (0-100) tracks how well your daily rhythms sync with your natural clock.
Dive into Methods & Sources
🧮 Score (with precision)

MyBioAge Index™ combines 14 scientifically-weighted health signals—including new Stress Resilience and Circadian Alignment—using your exact birth date for more precise biological age calculations. Refined day-to-day Recovery and Training Load scoring.

  • MyBioAge Index™ refreshes with improved accuracy whenever new HealthKit samples arrive.
  • Pace of Aging analysis now spans multiple time horizons with 6 months of data.
  • Color-coded zones (green/yellow/red) across all metrics for instant feedback.
Dive into Methods & Sources
🤖 Explain (smarter AI Coach)

Your AI Coach now understands all 14 metrics with access to 6 months of trend data for richer health conversations. Ask about stress resilience, circadian rhythm, or any metric—all on-device.

  • Ask "How's my stress resilience?" or "Is my circadian rhythm healthy?" for personalized insights.
  • 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 hero dial, weekly digest, and trends keep the MyBioAge Index™, Functional Age, and drivers easy to scan on iPhone, widgets, and watch.

Fitness Age and Biological Age dashboard
Fitness Age and Biological Age dashboard
Weekly digest explaining why your age changed
Weekly digest explaining why your age changed
Trend charts for VO₂max and recovery metrics
Trend charts for VO₂max and recovery metrics
Latest articles

Learn how to get more from the MyBioAge Index

We share coaching tactics, science explainers, and privacy updates to help you stay a step ahead of traditional health tracking.

View all articles
Why 6 Months of Health Data Makes Your Biological Age More Accurate

More data means better accuracy. MyBioAge now uses 6 months of your health history to calculate your biological age with unprecedented precision.

Stress Resilience Score: Understand How Your Body Handles Stress

Your body's stress response matters for longevity. The new Stress Resilience Score reveals how well you adapt to life's demands.

Circadian Alignment Score: How Well Are Your Daily Rhythms Synced?

Your body has a natural clock. The new Circadian Alignment Score reveals how well your daily rhythms support healthy aging.

Questions

Answers before you even download.

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

Contact us

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We typically respond within two business days. Share as much detail as you’d like.

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Ready when you are

Start tracking your biological age this Monday.

Get your comprehensive MyBioAge Index™ with Monday morning insights delivered in-app at 9 AM. Track 12 metrics, Recovery Capacity, Pace of Aging, and more—all on-device with zero servers. Have questions? Reach out anytime.

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