If you are looking for video calling over the Internet, across multiple platforms, ‘Google Duo’ is the latest for you! Extremely simple with minimalist options and interface, it is a refreshing addition to the calling experience. For starters, both you and the called party need the app to be installed. The app is available on both Android and Apple platforms. Once you identify and call a contact from your phone directory, the call receiver will see a preview of your video, even before she picks up the call – this is called the ‘knock-knock’ feature. As soon as the called party accepts the call, you get the video call going. You have 2 buttons on the screen – one to mute your mic and the other to swap your camera. Your last few called contacts will appear on your calling screen for ease of redialing.