Last updated: October 6, 2026
RHRSpark does not send your health data anywhere except between your own iPhone and Apple Watch, and it keeps no personal data on external servers.
With your permission, RHRSpark reads heart rate and resting heart rate data from Apple Health. It uses them only to show your readings and their trends on your watch face and in the app. RHRSpark does not write to Apple Health, and it never shares health data with third parties, advertisers, or analytics services.
RHRSpark keeps the values it shows on your iPhone and Apple Watch. These include recent readings and daily values. They move between your iPhone and Apple Watch only through Apple's WatchConnectivity framework.
RHRSpark uses Apple's StoreKit for the optional Pro unlock and the tip jar. Apple handles every purchase, and RHRSpark never sees or stores payment information. RHRSpark checks your purchase history on your iPhone and Apple Watch to unlock Pro. If you redeem an RHRSpark Pro code, you redeem it with Apple, and RHRSpark sends nothing to Filament Labs about it.
RHRSpark contains no analytics, crash reporting, advertising, or tracking code, and it sends no telemetry.
RHRSpark contacts only filamentlabs.io. It downloads a small configuration file for current product messages, and that request contains no health data or account information.
If you have questions about this privacy policy, please contact [email protected].
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