https://www.theverge.com/2019/1/8/18172132/apple-watch-ekg-electrocardiogram-health-science

The latest Apple Watch features an advanced heart-monitoring technology called electrocardiogram (EKG) that can tell you if there’s something off about your heart rhythm. Good news for our health, right?

Not exactly, doctors say. This might be a case where more data is not better. In fact, more data might lead perfectly healthy people to make unnecessary doctors’ visits that strain our health care system.