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.
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