I have an Apple watch, which connects to my phone, laptop and iPad. It is something of a nag (tells me to drink water, move around more and go to bed etc), but I rather like it. It's easy to glance at a text on your wrist without rudely getting your phone out in company, and a few of the apps are useful too, particularly the one that rings my phone when I can't find it under my nose🙄. It does check heart rate and so on, and knows if you are getting more or less steady on your feet. It would call an ambulance if I fell over suddenly, apparently, and give them my location. Obviously I hope I never need that facility, but you never know.