SpO2 and ECG on a Watch: What They Are Not
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
Tag: heart
What Your Watch Is Doing When It Reads Your Pulse
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