9 Great Reads From CNET This Week: Smartwatches and SpO2, Paycheck Apps, Nightmares and More What we really get out of tracking blood oxygen levels with a smartwatch, how certain apps get you paid before payday, why we have nightmares, and other good stuff.

If you have a smartwatch, chances are you use it to track some aspect of your health. During the pandemic, that may have included keeping an eye on you oxygen content in the blood. smartwatches by Apple, Samsung, Fitbit and Withings all offer this ability.

However, assessing what exactly these blood oxygen readings (aka SpO2) mean at any given point in time and over time is a complicated matter. CNET’s Lisa Eadicicco spoke to doctors and product experts about the ins and outs of this health feature, and she’s here to share her insights with you.

Her article is among the many in-depth features and thought-provoking commentary that appeared on CNET this week. So, let’s go. These are the stories you don’t want to miss.

Accessing more health data from home is helpful, but smartwatches still have limitations to overcome.

Apple Watch blood oxygen measurement


Also, wage apps don’t fix problems caused by inflation and low wages.

A phone on a table with a $100 bill on it

Getty Images

DNA analysis may finally have solved a mystery behind one of history’s deadliest diseases.

19th-century image of the Chu Valley in Kyrgyzstan with some people and horses in the middle distance

AS Leybin

From waking up in a cold sweat to lingering discomfort the morning after, here’s what happens when you’re struck by a nightmare.

Child sleeps with a night light

Donald Iain Smith/Getty Images

WWDC has come and gone, and still no Apple AR/VR glasses. But new software hints at future possibilities.

A 3D model of a Lunar Module floating on an iPad screen.


The test measures a variety of gamer skills. I wasn’t able to sniff into anything.

Team Liquid player Adil

Getty Images

The strange lack of sulfur dioxide in Venusian clouds does not appear to be the work of extraterrestrials.

The planet Venus against a black background

Planet-C project team/JAXA

Commentary: Somehow, reality dating shows just keep getting crazier, and actual dating isn’t far behind.

Two reality show contestants covered in mud and wearing fake antlers.

Discovery Plus

Fear of the dark is common in children, but adults can have it too.

Red-haired person peeking out from bedding

Axel Buckert/Getty Images

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