Apple Watch Series 10: The Health Sensor You Didn't Know You Needed

The Apple Watch Series 10 is the most significant redesign since the Series 4. It is thinner, lighter, and sports the brightest display Apple has ever put on a wearable. Most importantly, it adds sleep apnea detection. After a full month of wearing it, here is our verdict.

Design

At 9.7mm thick, the Series 10 is 10% thinner than the Series 9. The watch feels less obtrusive, sleeps more comfortably, and slides under shirt cuffs without catching.

Sleep Apnea Detection

This is the headline feature and it works. Sleep apnea detection uses the Series 10's accelerometer to detect breathing disturbances during sleep. Over 10 nights of testing, the watch correctly identified our tester's mild sleep apnea, which was then clinically confirmed by a sleep study. For the millions of Americans with undetected sleep apnea, this could be life-changing.

Battery Life

Apple claims 18 hours. We consistently got 20–22 hours with always-on display disabled. The new fast-charging system tops up from 0 to 80% in under 45 minutes.