The problem with pulse oximeters is the people who need them often can't use them. Yes I know it's not meant as a medical device. My dad has COPD and IPF but h

The problem with pulse oximeters is the people who need them often can't use them. Yes I know it's not meant as a medical device. My dad has COPD and IPF but he can't use the SPO2 meter on the Samsung phone I gave him (and Samsung disabled the SPO2 function for Canada). A Garmin VivoSmart 4 can't give a decent reading on him or me and it takes forever. Part of the problem is blood flow dad's fingers are ice cold due to his condition. My dad uses a cheap oximeter from Walmart it works better than anything else. It's the type that clips over a finger it's fast and seems to be accurate. I'd like to get a wristband or watch that has a good SPO2 meter but nothing seems to exist.