Don't get a Samsung Galaxy watch (o any smart watch, tbh)! Get a fitness watch specifically. I loved my FitBit Charge 3, but the screen burned out after two or three years. I got a Samsung Galaxy Watch 3, and it consistently fails in the fitness watch aspect. It doesn't capture my heart rate accurately and can't tell when I'm asleep or awake. It was a total waste of money, and I wish I had used the coupon FitBit gave me after my old watch burned out.

I really like my Apple Watch. It will send me a notification if I’m above 120 while at rest for 10+ minutes. I also use a sleep app with my watch called AutoSleep and it works great. They have a heart rate app as well I believe but I haven’t tried it