is a video calling application that lets you chat one-on-one with your loved ones. It's cross-platform so that both Android and iOS users can chat with one another, which is not the case with its rival FaceTime. Google Duo works with both WiFi and mobile web connectivity, so you're able to chat with your friends and family at home or on-the-go. It also includes Knock Knock
, a feature that lets you preview chats before answering them as long as the caller is in your contacts.
Google Duo for Android is also available on iPhone