I purchased a razor branded Smartwatch, way back when. Thing could barely connect to my phone, it's battery life was atrocious when it did, and all it did was show the time and track steps. It didn't have any built-in notifications so you had to use a separate app. This was fairly early in smart watches though, it was pretty fad-esque.
None of them do what I want, which is to check my blood sugar via UV light. They've been talking about it for at least 15 years. I know why too. They want to be able to sell all our info, and medical stuff is protected by HIPPA.