Well I wanted to start with the U8 smart watch I bought off of Geek one of my favorite places to by stuff. The unit I got won't power up (bummer) getting a refund on this puppy as soon as geek support sends me the how to's. I got my GV9 watch on Saturday from Geek, so far it is pretty nice, its really built for the Android user (since it can be a phone as well!) it will connect to a iPhone 5 or better via bluetooth but there is not an app in the App store that works with it. You can get some things off your iPhone like you last numbers dialed bluetooth audio. Overall the GV9 is very nice bit of kit!
I have now using a Apple Watch 3 which I am really impressed with! It works with a ton go iOS apps on my iPhone 8 Plus.