The Samsung Galaxy Watch, Apple Watch and Google-owned Fitbit trackers all offer blood oxygen tracking. Some of Fitbit's features were integrated into the Pixel Watch at launch — though not ...

Smartwatches have sensors to track health and well-being, including blood oxygen levels. The Pixel Watch comes with a SpO2 sensor, but there's a catch.

The Pixel Watch gets nighttime blood oxygen saturation, high and low heart rate alerts, auto-pause workouts, and a bunch of other features in a software update. Also, finally, ...