Pulse oximeters are selling out because of the pandemic. Most people don’t need them

https://qz.com/1832464/pulse-oximeters-for-coronavirus-unnecessary-but-selling-strong/

Amazon is currently flooded with listings for pulse oximeters, many of which are not FDA-approved. People who use such devices are at risk of getting an inaccurate reading. A 2016 study in Anesthesia & Analgesia looked at a number of inexpensive pulse oximeters not cleared by the FDA, and found that many of them were prone to large errors.

A number of wearables offer SpO2 features, including ones offered by Fitbit and Garmin. Apps that use your smartphone’s camera to deliver SpO2 measurements can be hit-or-miss. Such technology hasn’t been cleared by the FDA. One study looked at three pulse oximeter apps: iOx, OX, and POx. All three apps delivered inaccurate SpO2 measurements, according to the authors, from the University of Alabama and the University of Michigan.