It is only for Android watches and not for phones/tablets at all? I wonder if the Watch Face leaves the present.
The application is used by the Android watches. You can't use it on a phone or tablet since it will have no use for it. I've checked the official Play Store link, but there was nothing to indicate the support for phones/tablets.
If you want to check for additional applications, use the Play Store or Android Informer's search function to search: