Apple

Pretty much what everyone has said, plus I use it to time my insulin pre-bolus for myself and my daughter. I also use it to set a timer to check-in on my daughter to make sure she is eating her food.

I can’t tell you (before the watch) how many times I’ve pre-bolused, then completely forgot to eat. I start getting low glucose alerts, then realize what I’ve done.

I previously used to set timers on my phone, but you could only have one at a time.