Google starts rolling out Pixel Watch 3 Loss of Pulse Detection in the US

Following the April 2025 OTA update and Scam Detection yesterday, Google is now rolling out Loss of Pulse Detection in the US.

Originally expected at the end of March, Google is now rolling out Loss of Pulse Detection in the US after being granted Food and Drug Administration (FDA) clearance. It follows European availability last year.

To enable, make sure the Personal Safety Wear OS app is up-to-date on your Pixel Watch 3. The latest version we’re seeing on the Play Store is 2025.03.19.x.

Afterwards, go to the Pixel Watch companion app on your phone (version 3.4+) > Safety & emergency > Loss of Pulse Detection to start the set-up process.

Google tells us that it’s beginning to roll out today and will be fully available over the coming weeks.

A cardiac arrest, respiratory or circulatory failure, overdose, or poisoning is considered a loss-of-pulse (“your heart stops beating”) event. When detected, the Pixel Watch 3 will prompt users to confirm they are okay, like Fall and Car Crash Detection.

If there’s no response (or motion), the wearable will call emergency services and provide your location, as well as details about what’s happening. Loss of Pulse Detection makes use of the Pixel Watch 3’s multipath heart rate monitor, other sensors, and a “multi-check, AI-based algorithm.”

Officially: “Loss of Pulse Detection may not detect every instance of a loss of pulse and is not intended for users with pre existing heart conditions or those who require cardiac monitoring. It does not diagnose or treat any medical condition or provide follow-up care.”

More details are available here.