I have had this watch (and thus this app) for about a month now. It first took multiple (10+) tries to just register and log on. Part of the issue was that everything was written in Chinese and I didnt understand anything. I am tech savy, so this was not a "user error ". Finally I get it going. But all measurements are metric. I understand that the rest of the world uses metric, but since a large part of the potential market is here in the US, there should be a way to change settings for this.
And last, but certainly not least, I have been attempting to sync the watch and app for days now. I have done it before, but now it just keeps giving me an error message sync failed. For a cheap (and huge) watch, I guess I got what I was expecting. I use the notifications and pedometer, but the heart rate monitor is very off. And since the watch wont sync now, I guess its just for notifications and checking my pedometer manually. Very disappointed.