Pulse Oximeters
Pulse oximeters I've tested for tracking blood oxygen and overnight SpO2. Which ones are accurate enough to trust, and which aren't.
Pulse OximetersCheckme O2 Max vs O2 Ultra: I Slept in Both Against a $1,500 Hospital Oximeter
Two premium Wellue wrist units, one identical accuracy score, and a single difference that actually decides which one you buy. Three nights each against a hospital-grade Nonin 3150.
Pulse OximetersCheckme O2 Max Review: I Tested It for 3 Nights Against a $1,500 Hospital Oximeter
The FDA-cleared pick of the lineup, and the one I hand to anyone who wants overnight oxygen data they can actually work with. Three nights against a hospital-grade Nonin 3150.
Pulse OximetersWellue O2Ring Review: I Slept in It for 3 Nights Next to a $1,500 Hospital Oximeter
The most comfortable ring I've tested — and the honest reason it isn't my top pick. Three nights against a hospital-grade Nonin 3150, second by second.
Pulse OximetersThe Best Infant Pulse Oximeter of 2026: I Tested 3 Wearable Oxygen Monitors Against a Hospital-Grade Monitor
Three wearable oxygen monitors, tested against a hospital-grade monitor on my own baby. Here's the one I trust, the budget pick, and the one to skip.
Pulse OximetersSense-U Smart Sock Review: I Tried Hard, But Can’t Recommend It
I wanted the Sense-U Smart Sock to be the affordable Owlet, and I tried hard to make it work. Here's the honest reason I can't recommend it — and the still-supported monitors I'd get instead.
Pulse OximetersWhat Happened to the Masimo Stork? (It’s Discontinued — and the App Is Gone)
Masimo discontinued the Stork and shut its app off after June 30, 2026 — and the monitor can't work without it. Here's the full story, and the still-supported monitors I'd get instead.
Pulse OximetersBabyTone Sleep Sock Review: Is the Budget Pick Worth It?
I ran a $1,500 hospital monitor next to the budget BabyTone sock on my own son for two nights. Here's the honest accuracy data, the alarm story, and the one thing its low price is hiding.
Pulse OximetersOwlet Dream Sock Review: Accurate, But Is It Worth It?
I strapped a hospital-grade monitor next to the Owlet on my own son for three nights. Here's the honest accuracy data, the alarm story, and whether Owlet 360 is worth paying for.
Pulse OximetersLookee Sleep Ring Review: I Tested Both Versions — Skip the Pro
I tested the Lookee Sleep Ring against a $1,500 hospital monitor for 3 nights, and against the Pro version. Here's why the cheaper one wins.
Pulse OximetersBest Overnight Pulse Oximeters for Sleep Apnea (Lab Tested)
Sleep apnea leaving you exhausted? We spent 480 hours lab-testing the best overnight pulse oximeters against a $1,500 hospital monitor. See the winners!
Pulse OximetersWhich Wellue Oximeter Should You Buy? 5 Models Lab-Tested
Which overnight oximeter actually tracks drops? We tested Wellue O2Ring, SleepU & O2Ring S, Checkme O2 Max/Ultra against a hospital-grade Nonin 3150.
Pulse OximetersEMAY SleepO2 Accuracy Test: Beat the $300 Models?
Suspect sleep apnea? We reviewed the EMAY SleepO2’s ability to track oxygen drops and desaturations. Discover why this "hidden gem" scored 96.5/100 for accuracy.Nothing here yet. See everything in Reviews.