Google has begun rolling out its Loss of Pulse Detection feature to Pixel Watch 3 owners in the United States. This potentially life-saving feature uses the watch’s optical heart rate sensors to detect if the wearer’s pulse ceases at any point.

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.