Is the next best thing to being with someone in person, but too often it can be a frustrating or complicated experience. You shouldn’t have to worry about whether your call will connect, or if your friend is using the same type of device as you are. It’s no wonder that nearly half of us never make video calls on mobile
https://googleblog.blogspot.cz/2016/08/meet-google-duo-simple-1-to-1-video.html
https://googleblog.blogspot.cz/2016/08/meet-google-duo-simple-1-to-1-video.html