Privacy Policy

Last updated: October 26, 2026

Your privacy is our priority. Stress Level has no accounts and does not collect your personal data. Your health data is processed only on your devices.

Health and Motion Data

Stress Level reads data from the Health app, such as heart rate and heart rate variability, and motion activity from your devices to calculate your stress level. The app asks for your permission before it reads this data, and you can change your choice anytime in Settings. This data:

  • Is processed only on your devices
  • Stays on your devices. Stress Level saves only what it needs to show your history
  • Is never sent to us, to TelemetryDeck, or to anyone else

Analytics

We use TelemetryDeck (TelemetryDeck GmbH, Von-der-Tann-Str. 54, 86159 Augsburg, Germany), a privacy-focused analytics service based in Germany and designed to comply with the GDPR. It receives anonymous usage events, such as which screens are viewed, and basic technical information, such as the app and system version. It never receives health data, motion data, stress levels, or personal information.

TelemetryDeck does not store IP addresses and does not use cookies or advertising identifiers. To count devices, it uses an identifier that is anonymized on your device and again on TelemetryDeck’s servers, so neither we nor TelemetryDeck can trace it back to you.

We do not use crash reporting, advertising, or any other personal data collection services.

Your Rights

You have complete control over your data:

  • Change which data Stress Level can read anytime in Settings
  • Delete the app anytime to remove all data it saved on your devices

Changes to This Policy

We may update this privacy policy from time to time. Any changes will be posted on this page with an updated “Last updated” date.