Privacy Policy

Last updated: April 6, 2026

Undercurrent ("the App") is developed by Hashing Corp. This policy describes how we handle your data.

Data Collection

Undercurrent does not collect, store, or transmit any personal data to external servers. All health data is read from Apple HealthKit, processed on your device, and stored locally using Apple's SwiftData framework.

Health Data

The App reads the following data types from Apple Health:

• Resting Heart Rate
• Heart Rate Variability (HRV)
• Respiratory Rate
• Blood Oxygen (SpO2)
• Wrist Skin Temperature
• Sleep Analysis
• Step Count
• Active Energy Burned
• Exercise Minutes
• VO2 Max
• Heart Rate Recovery
• Stand Hours

This data is used solely to compute wellness scores, detect patterns, and generate personalized insights displayed within the App. Health data never leaves your device.

Third-Party Services

Undercurrent does not use any third-party analytics, advertising, or tracking services.

Data Storage

All computed scores and insights are stored locally on your device using SwiftData. Uninstalling the App removes all stored data.

Children's Privacy

The App is not directed at children under 13. We do not knowingly collect any information from children.

Changes to This Policy

We may update this policy from time to time. Changes will be posted on this page with an updated revision date.

Contact

If you have questions about this policy, contact us at privacy@hashingcorp.com.