TensionRadar

HRV and stress at a glance

Free · In‑App Purchases

TensionRadar helps you explore the heart data your Apple Watch records in Apple Health, with expressive characters, personal comparisons and guided breathing. UNDERSTAND YOUR READINGS The 0–100 score is a wellness estimate based on HRV relative to your personal history, with heart rate included when suitable data is available. Current readings use references for the same HRV statistic and time of day. See the reading age, supporting values and confidence. Missing, stale or activity-affected data can leave the current score unavailable. HRV does not directly measure emotions, and the score is not a diagnosis. While newer data arrives, Radar keeps the last qualified assessment visible with its original measurement time. If no qualified assessment is saved, it shows the latest available HRV without a tension score. Historical results do not trigger new stress alerts. The app, Watch dashboard and Radar/score widgets use the same reading policy; background refresh timing can differ. EXPLORE YOUR HISTORY View daily HRV, individual SDNN measurements, resting heart rate and hourly patterns. The daily HRV calendar compares daily averages with your usual days; it is not a record of your mood. On unfolded iPhone Duo, keep the calendar beside the selected day's details. TAKE A BREATH Follow paced breathing, review saved sessions and keep a journal. Add HRV and resting heart rate trend widgets. Use the Apple Watch app and compatible complications. Nimbus is included; additional characters are available through the optional Character Pack purchase. UPDATES AND PRIVACY Apple controls when measurements and background updates arrive. Readings and alerts are not continuous or guaranteed to be immediate. No account is required. Health data is processed on your devices. Requires iOS 18 or later and an Apple Watch that records HRV. TensionRadar is a wellness tool, not a medical device. It does not diagnose or treat conditions. Consult a healthcare professional before making medical decisions.

  • 5.0
    out of 5
    1 Ratings

Added health references beside metric explanations and reports, with clear limits for app-defined scores. Simplified the Radar homepage and improved the unfolded layout. App and widgets keep consistent reading times. Radar now keeps your last qualified reading visible, with its original time, while waiting for newer data. The app, Watch dashboard and Radar/score widgets use the same reading policy. Custom Radar gauges now share an open ring, colors and score marker. The Watch dashboard places your companion above the reading details for easier reading. Designed for iPhone Duo: see your reading and its supporting metrics side by side. In Trends, choose a day in the calendar to explore its HRV readings and saved sessions. Breathe adapts as you fold your phone. On unfolded iPhone Duo, check in beside your journal history in a new two-pane layout. New HRV and resting heart rate trend widgets bring your history to the Home Screen. This update also improves personal HRV comparisons, reading freshness, activity handling and tension alerts. The daily HRV calendar now shows each day's value and distinguishes daily history from your current reading.

The developer, Chen He, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
Chen He
Size
26 MB
Category
Health & Fitness
Compatibility
Requires iOS 18.0 or later.
  • iPhone
    Requires iOS 18.0 or later.
  • Apple Watch
    Requires watchOS 11.0 or later.
Languages
English and 8 more
  • English, French, German, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
Age Rating
9+
In-App Purchases
Yes
Copyright
© 2026 Chen He