The Journal.
Every essay, review, field note, and interview we've published. New pieces arrive on Tuesdays; full issues close every three months.
The Apple Watch Series 12 Deal Is Real. The Sleep Claim Is the Part Worth Auditing.
The advice comes around every September, and this year it arrives with a price tag attached: $219. Trade in an eligible older wearable, preorder the Apple Watch Series 12 before the September 18 ship…
Three Kinds of Help With Pediatric CPAP: Six Weeks, One Machine, and My Own Sleep Data
My son is nine. The adenotonsillectomy that was supposed to end his obstructive sleep apnea bought us about eleven months; the repeat sleep study put him back in the range where his pulmonologist…
Three Weeks, Twelve Late Espressos, One Apple Watch Ultra 4: What the Sensors Actually Caught
The Apple Watch Ultra 4 landed on a Tuesday, and by Wednesday evening I was drinking a double espresso at six o'clock on purpose.
What an Apple Watch Readiness Score Can't See: The 150 Milligrams You Drank at 3:40 P.M.
A number arrives before you are fully awake: 74. That is what an Apple Watch readiness score looks like on an ordinary Tuesday — a night of sensor data compressed into two digits and a colored ring…
Nine Nights With Apple Watch Live Rewind: What the Secure Enclave Actually Protects
A friend forwarded me a post with something like forty thousand reposts on it. The line was clean enough that three other people quoted it back to me the same week: Apple just shipped a wiretap with a…
India's Sleep Industry and Market Expansion Rests on a Number Almost Nobody Checked
A mattress brand's hoarding at the Bengaluru airport promised, in a serif borrowed from luxury watchmaking, "the sleep you've been postponing." No-cost EMI, twelve months.
The Thirty-One-Dollar Mouthguard: What Latin America Healthcare Market Sizing Gets Wrong About Oral Appliance Therapy
The device cost thirty-one dollars and arrived in a padded envelope with instructions in three languages.
I Spent 23 Days Trying to Confirm One Device's Status in the Philips Ventilator Recall. Here's What Each Channel Actually Returned.
The question I set out to answer is narrow enough to fit on an index card. For one specific machine — a Trilogy 100 in a back bedroom in Ohio, running about sixteen hours a day for a man with ALS…
What an FDA Medical Device Recall Actually Means — and Why Luna G3 Owners Should Read Their Label Tonight
Two numbers anchor the recall notice for the Luna G3 APAP. The first is 20,160 — roughly the count of devices sent to American bedrooms over about twenty months.
I Wore an Apple Watch, a Garmin, and a Whoop for 46 Nights. They Disagreed About My Sleep by 34 Minutes.
Thirty-four minutes. That is the median disagreement between an Apple Watch Series 11, a Garmin Fenix 8, and a Whoop 5.0 about how long I slept on a given night — same bed, same body, three straps…