Privacy Policy
Last updated: May 16, 2026
HeatLab is built with privacy as a core principle. Your health and workout data belongs to you, and we've designed the app to keep it that way.
What Data HeatLab Collects
When you use HeatLab, the app stores the following information:
- Workout data (heart rate, resting heart rate, duration, calories burned)
- Session metadata (date, time, workout type)
- Temperature readings you enter for each session
- Perceived effort ratings you log per session
- Custom tags and notes you add to sessions
- App preferences and settings
What We Do NOT Collect
We do not have access to your health data. Specifically:
- Your workout data is never sent to our servers
- We do not use third-party analytics that track your health information
- We do not sell, share, or monetize your personal data
- We do not use advertising trackers
Where Your Data is Stored
Your health and workout data is stored locally on your devices only:
- Locally on your device — Your iPhone and Apple Watch store all session data, heart rate history, baselines, and personal records on-device. This data does not sync to iCloud or any external server.
- Your private iCloud account (minimal app state only) — A small amount of non-health app state, such as which workouts you've dismissed from import suggestions, syncs across your devices using your personal iCloud private database. Only you have access to this data.
We cannot access, view, or retrieve your workout data because it never leaves your devices.
Apple HealthKit Integration
HeatLab integrates with Apple HealthKit to read workout data (with your permission). Specifically, we access:
- Heart rate — active heart rate samples during your workouts
- Resting heart rate — used to calculate your Heat Fitness Score baseline
- Active energy burned — calories during workouts
- Date of birth — used only to calculate your maximum heart rate for zone analysis; only your age is derived and stored, not your birth date
- Workout records — session type, duration, and timestamps
This integration only accesses data you explicitly grant permission for, reads data locally on your device, and never transmits HealthKit data to external servers.
AI Insights
If you use AI-powered insights (available on devices with Apple Intelligence), this processing happens entirely on your device. Your data is not sent to external AI services.
How to Delete Your Data
You have full control over your data:
- Delete individual sessions — Swipe to delete any session within the app
- Delete all data — Uninstall the app to remove all local data. If you use iCloud sync, your data will also be removed from iCloud.
- Request deletion — Contact us at support@macpheelabs.com if you need assistance
Children's Privacy
HeatLab is not intended for children under 13. We do not knowingly collect information from children.
Changes to This Policy
We may update this Privacy Policy from time to time. We will notify you of any significant changes through the app or by updating the "Last updated" date above.
Contact Us
If you have questions about this Privacy Policy or your data, please contact us:
Email: support@macpheelabs.com