HRV Tracker
Analyze your heart rate variability, understand your recovery and optimize your health every day.
Analyze your heart rate variability, understand your recovery and optimize your health every day.
A seamless experience across all your Apple devices
Everything you need to understand your HRV
View your SDNN heart rate variability directly from Apple Health with interactive charts.
Minimum, average, maximum and trends. Understand how your HRV evolves over time.
Dedicated Watch app with complications to see your HRV at a glance on your watch face.
5 zones based on Z-score statistical analysis to assess your recovery level.
Personalized HRV references based on your age group from scientific literature.
Widgets for Lock Screen and Home Screen for instant access to your data.
Based on Z-score statistical analysis of your personal baseline
Z-score > +1.5 — Your body is fully recovered and ready for intense effort
Z-score +0.5 to +1.5 — Recovery above your baseline
Z-score -0.5 to +0.5 — Normal recovery level for you
Z-score -1.5 to -0.5 — Recovery below your normal
Z-score < -1.5 — Rest recommended, avoid intense effort
Average SDNN values (ms) for healthy individuals
| Age | Poor | Fair | Good | Excellent |
|---|---|---|---|---|
| 20-29 | < 32 | 32-50 | 51-65 | > 65 |
| 30-39 | < 30 | 30-45 | 46-60 | > 60 |
| 40-49 | < 25 | 25-40 | 41-55 | > 55 |
| 50-59 | < 20 | 20-35 | 36-45 | > 45 |
| 60-69 | < 18 | 18-30 | 31-40 | > 40 |
| 70-79 | < 15 | 15-25 | 26-35 | > 35 |
| ≥ 80 | < 12 | 12-20 | 21-30 | > 30 |