Google after launching its Duo a video calling app in Google I/O 2016 yesterday, now it Begins Pre-Registration for Google Duo also earlier pre-registration of Allo by google app also begins yersterday. You can pre-register for the app by going through the Play Store link below the Article.

Duo is a simple, fast one-to-one video calling app for everyone—whether you’re on Android or iOS, a fast or slow connection, in New York or New Delhi. Like Allo, Duo is based on your phone number, allowing you to reach anyone in your phonebook. And its simple interface fades away when you’re in a call, so it’s just the two of you.

One of our favorite features of Duo is Knock Knock, which shows you a live video preview of the caller before you pick up. Knock Knock invites you into the moment, making calls feel spontaneous and fun. Once you answer, Duo seamlessly transitions you right into the call.

Play Store Link 

Things Revealed at Google IO 2016: