Qardio Core ECG Monitor
Another fitness-focused tracker, this is not. The Qardio Core ECG Monitor delivers medical-grade data to both your phone and your caregiver the whole time you have it on. In addition to ECG readings, it also keeps track of your respiratory rate, heart rate, heart rate variability, skin temperature, and, yes, activity, giving your doctor a far more nuanced view of your daily health and routine than any wrist-bound gadget.