Best for Android

 I’ve not got a chance to explore full functions of this smart watch, since I have the Iphone and not all functions work with iphone. I didnt know this. It only does the call via Bluetooth and alerts comethrough but no messages. but I am so pleased I bought this watch, at this affordable price. Since my som has an Android he loves it. He plays with it all the time. 
The instruction says it comes with a micro-sim card slot, in which case, it can be used as a phone, I have not tried that either, as I bought this watch for convenience and fun, not really want to make it a communication equipment. Therefore, I simply connect it to my smart watch via Bluetooth, so I would not miss a call when I am away from my phone.
High resolution display, build-in microphone and speaker, powerful functions and simple but nice looking appearance make this smart watch an outstanding product. Would recommend to others that are using the Android