Wearables
Wearables track sleep stages, heart rate variability, and resting heart rate on your wrist or finger; here are reviews, accuracy notes, and field tests.
Two Smart Rings, 40 Nights, One Afternoon Coffee: The RingConn Gen 3 Review
The claim you have heard, probably from someone holding their phone at brunch: buy one of the good smart rings, drink your coffee too late, and the app will hand you the bill in the morning. A score.
Samsung Health AI Features vs. My Sleep Data: Six Weeks Trying to Get It Back
Here is the question I could not stop turning over, somewhere around the fourth night of sleeping in a watch: if I let Samsung Health AI features grade my sleep every night, whose sleep is it…
I Wore Three Head-Mounted Displays to Bed So You Don't Have To: What Virtual Reality Actually Does to Sleep Onset
For six weeks I ended my evenings the way a certain corner of the wellness-tech market keeps insisting I should: strapped into a headset, watching a virtual campfire or a slow drift over digital…
When Should You Take Your Wearable Sleep Tracker Data to a Doctor?
Your watch told you that you slept 7 hours and 14 minutes, that your "sleep score" was 87, and that you spent 14% of the night in deep sleep. The number felt good.
Do Sleep Apps Actually Know When You're Asleep?
You wake up, reach for the phone, and there it is: a number. 78. A little hypnogram with tidy colored bands — light, deep, REM — as if a technician sat beside your bed all night with electrodes and a…
Your Apple Watch and Sleep Apnea Detection: What the Wrist Actually Sees
There's a question a lot of Apple Watch owners have quietly asked themselves around 2 a.m., usually after a partner has complained about the snoring again: If something were really wrong with my…