Privacy policy

Health data stays in your hands.

Watch HRM BLE reads heart rate during a session you start and sends it directly to a nearby Bluetooth heart-rate receiver. I don’t receive your heart-rate data through the app.

Watch HRM BLE 1.0. This policy describes the released Apple Watch app, available on the App Store. Last updated .

Health access and live sessions

When you tap Start, the app asks for Apple Health permission to read heart rate and write a workout. It uses a live workout to receive readings during the session. When you end the session, the app discards its workout record. The session may still affect Activity rings or another workout app.

Bluetooth sharing

While a session is active, the app advertises the standard Bluetooth Heart Rate Service. A nearby receiver that subscribes can receive live heart-rate measurements directly from the Watch, without an iPhone relay. Choose a receiver you trust: the receiver or its software may store or share what it receives under its own settings and policies. End broadcast stops the app’s workout, removes its Bluetooth heart-rate service, and clears its receiver subscriptions.

Last HR widget snapshot

The app keeps a small snapshot on the Watch in shared local storage so its optional Smart Stack widget can show the last reading and its age. That snapshot contains session state, one BPM value, the Health sample time, and the time it was published. It is written even if you have not added the widget. The first reading is published, then updates are limited to at most once every five minutes. The app keeps no reading history in this store.

Normal End or session failure replaces the snapshot with a state containing no reading. If the app exits unexpectedly, the last value and time may remain until the next Start or End. WidgetKit controls refresh timing, so an earlier card may remain visible for a time.

Data collection

Version 1.0 has no developer-operated server, account, analytics, advertising SDK, or in-app purchases. I don’t collect data through the app or receive the heart-rate measurements it broadcasts. Health data remains subject to Apple Health permissions and the Watch’s storage controls.

Your choices

You can stop broadcasting with End broadcast, remove the widget, change Health access in Watch settings, or remove the app and its local data using watchOS controls.

Contacting support

If you email me, I receive your email address and the information you choose to include, and use them to respond to your request. Please do not include heart-rate logs or other health data.

Privacy questions

You can email me at:

hrm.ble.support@fastmail.com