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
Sleep
August 2026 · 9 min
Apple Watch Alternatives: Seven Weeks With Screen-Free Fitness Trackers
The first night I slept without a screen on my wrist, I fell asleep in nine minutes. The night before, with the watch on, it took thirty-one.
By Patrick Sumner · Read →
Wearables
August 2026 · 6 min
I Slept in Four Budget Fitness Trackers for Three Weeks to See If a Cheap Band Can Catch a 4 p.m. Espresso
On the ninth night I finally did the thing I'd been putting off: a double espresso at 4:12 p.m., timed against the kitchen clock, and then four budget fitness trackers strapped across two wrists like…
By Henry Ashford · Read →
Wearables
August 2026 · 7 min
I Tested Bioelectrical Impedance Against Its Replacements: What AI Health Technology Actually Knows About My Body
There is a particular kind of disappointment that happens on a bathroom scale at 6:40 in the morning. Not the weight — the other number.
By Diane Norwood · Read →
CPAP
August 2026 · 7 min
The Case for Sleep Apnea Treatment Expansion Beyond the Mask
The most consequential development in sleep apnea in the last decade was not a therapy. It was a notification.
By Rachel Stanton · Read →
Wearables
August 2026 · 10 min
Can Wearable Technology Actually Detect the Caffeine in Your Body?
Your ring says you slept 6 hours 41 minutes and gives the night a 58. It flags elevated resting heart rate and a late-arriving temperature minimum.
By Daniel Whitfield · Read →
Sleep Apnea
August 2026 · 6 min
Sleep Apnea Detection and the Founder Origin Story: 21 Nights, Three Devices, One Home Test
Back the founder who lived the problem. In sleep tech that advice has a specific shape: the resident who woke up on a hospital floor, the engineer whose father died at 61 in his own bed, the…
By Rachel Stanton · Read →
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