The department of
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.
Pieces
6
Wearables
September 2026 · 12 min
Smartwatch Medical Features vs a Double Espresso: Two Weeks With a Blood Pressure Cuff in My Watch Strap
On the fourth morning of this experiment, my watch said 131/83 and the cuff on my upper arm said 120/78. I had made a double espresso 58 minutes earlier.
By Natalie Forsythe · Read →
Wearables
September 2026 · 13 min
Oura Ring 5 Setup and Troubleshooting: Why My Ring and My Apple Watch Disagreed About Every Night
For eleven nights my Oura Ring 5 and my Apple Watch described two different sleepers. The watch said I slept about seven hours and ten minutes on a typical weeknight and woke briefly twice.
By Natalie Forsythe · Read →
Wearables
September 2026 · 7 min
The Apple Watch Deal Is Easy to Spot. What It Can Tell You About Coffee and Sleep Is Harder
Every September, the same small drama plays out on Amazon. Apple ships a new watch, the listing goes live at full price, and a certain kind of shopper starts refreshing the page.
By Laura Pendleton · Read →
Sleep
September 2026 · 10 min
I Spent 63 Nights Running a 4 p.m. Espresso Against the Apple Watch Readiness Score
For eleven weeks I ran a 4 p.m. espresso against the Apple Watch readiness score and four of its competitors, and logged what each of them said the next morning.
By Claire Munroe · Read →
Sleep
September 2026 · 5 min
I Wore Four Fitness Trackers to Bed for 21 Nights. On the Worst Night They Disagreed by 68 Minutes.
Four devices, twenty-one nights, one wrist and one finger. I ran this because I wanted to know whether fitness trackers can actually see a night of sleep or whether they are running a very…
By Laura Pendleton · Read →
Sleep
September 2026 · 5 min
Does the Apple Watch Series 12 Actually Know You Had Coffee at 3 p.m.? Twenty-One Nights of Trying to Find Out
The question I wanted answered had nothing to do with the case material. I bought the Apple Watch Series 12 with one job in mind: if I drink two shots of espresso at three in the afternoon, will the…
By Daniel Whitfield · Read →
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