@capnhal I use a Galaxy 4 watch that is now four years old and was updated by Samsung to record ECG and blood pressure. It works well. You must recalibrate your BP function every 28 days with a proper cuff. I also have the Galaxy 6 which came with those capabilities. Both watches can also measure SPO2 during sleep, and monitor the quality and duration of your sleep. The recent Galaxy 8 can even take skin measurements to assess the oxidants/free radicals in your skin and coach you about taking better nutrition. !!

However, there's a caveat. The ones I'm familiar with cannot take concurrent/running ECG to warn you of AF. Perhaps the Galaxy 8 can. So, with the earlier models you must take an ECG manually whenever you happen to want to or think to.