Google releases Pixel Watch 3 Loss of Pulse Detection

Google has started rolling out its Loss of Pulse Detection for the Pixel Watch 3 users in the US.

The rollout started on Tuesday as part of the latest Personal Safety Wear OS app update, version 2025.03.19.x (via 9To5Google). It's a gradual rollout that will become fully available over the next few weeks, so if you're not seeing it yet, keep checking back.

The feature works by using heart-rate sensors on the part of the Pixel Watch that touches your skin. If it detects the absence of a pulse, it will vibrate and send you a message asking if you're okay. If you don't respond within 15 seconds, the Pixel Watch will "play a loud sound and start a countdown," according to the Pixel Watch support page. After this it will call emergency services, sharing an automated message and your location. Loss of pulse can occur from several issues, including "cardiac arrest, respiratory or circulatory failure, overdose, or poisoning," the page read.

If you don't respond, the Pixel Watch will place a call to emergency services. Credit: Google

Loss of Pulse Detection for the Pixel Watch 3 received clearance from the Food and Drug Administration (FDA) in February and was initially slated for release in late March. It has been available in the EU since September of last year.

To enable Loss of Pulse Detection, go to the Google Pixel Watch app on your phone then tap Safety & Emergency. From there, tap Loss of Pulse Detection to set up the feature. Your Pixel Watch 3 must be updated to the latest version for this to work.

This is one of several health and safety features Google has developed for the Pixel and Pixel Watch. Previously, it launched fall detection and irregular heartbeat monitoring.