We make things simple
It is eleven at night and your watch has shown you a number you do not like. Ten minutes later you are searching your symptoms and feeling worse. Everyone with a wearable has had that evening. The device is not โฆ
Two features on modern watches borrow their names from a hospital. One is SpO2 and the other is ECG. Seeing them on a listing makes it sound like your wrist is now a clinic. It is not. Both are worth โฆ
Take your watch off at night and look at the back of it. Two or three tiny green lights are still blinking in the dark. They have been doing that against your skin all day. That is how your watch โฆ