@akioohtori I have a fitbit but right now can't tell you the model, it's about 4 years old and still seems to work fine. Battery will last a few days, colorful screen and all.
Problem I have it is just isn't that useful. It will get messages and buzz if I get a call but I can't answer that call or respond with anything other than a few canned responses. I can do music control but only if I load songs somewhere and not through spotify or podcast apps that I actually use. It will track steps and tell me to move which isn't particularly useful when I'm driving for a long time or on a plane or somesuch.
It tells time pretty well though, at least close enough for me to get to work on time.
My wife is an apple user and seeing what she can do on an apple watch I totally get the appeal over what I have, but I'm in the android camp without reason to change and I think all the features would be completely lost on me if I could use the watch at all.