After months of anticipation and FDA approval, Google has began to roll out the potentially life-saving “Loss of Pulse Detection” function to Pixel Watch 3 customers in the United States. With this big improvement, the smartwatch is no longer only a fitness tracker, but also a vital health and safety tool.
A Game-Changer for Wearables
The functionality, which was first mentioned earlier this year and was supposed to be released in March, was discreetly included in the April 2025 Pixel Watch update, following significant bug fixes. The capability has already been available in parts of Europe, but its introduction in the United States is a significant milestone, underscoring Google’s dedication to pushing the boundaries of what a wristwatch can do in an emergency.
What is “Loss of Pulse Detection”?
This innovative feature is designed to detect when your heart stops beating — such as during cardiac arrest, respiratory failure, or an overdose — and can automatically call emergency services if you’re unresponsive.
Here’s a breakdown of how it works:
- Detection: Uses a multipath heart rate sensor and accelerometer to detect a potential loss of pulse.
- AI Analysis: Google’s algorithm confirms signs of cardiac arrest or similar emergencies.
- Alert Sequence: The watch tries to get your attention first.
- Automatic Help: If there’s no response, it will call emergency services, share your real-time location, and report the suspected issue.
How to Enable It
To access the feature, make sure the following are up to date:
- Your Pixel Watch 3 has the latest April 2025 software update.
- Your Personal Safety app on the watch is updated.
- Your paired phone is running Pixel Watch app version 3.4 or higher.
Once everything is current:
- Open the Pixel Watch app on your phone.
- Navigate to “Safety & emergency.”
- Toggle on “Loss of Pulse Detection.”
Google has confirmed the rollout began today and will continue over the coming weeks, so if you don’t see it yet, check back soon.
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Important Notes
This is not a medical device and isn’t intended for individuals with known heart conditions or those who require continuous cardiac monitoring.
It’s designed for unexpected emergencies where every second counts.
While not perfect, it could be the critical safety net you never thought you’d need — until you do.
Final Thoughts
The addition of Loss of Pulse Detection to the Pixel Watch 3 marks a pivotal evolution in wearables — moving from health tracking to true emergency response. It’s not just about steps or sleep anymore; it’s about survival.
So, if you’re a Pixel Watch 3 user, this is one feature worth turning on. Because in those rare, life-threatening moments, your watch might just save your life.
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