My grandad has a bad cold and has been quite short of breath. It's super hard to get him to get medical attention. I'd like to buy him an oximeter. But there are loads on amazon with very mixed reviews. Can anyone recommend a reliable one and the beat place to buy one please? As I feel like an inaccurate one is no use at all. He's 87 so I'd like an easy to use one. With no app connection or anything.
Thanks