Officially Launched Aug 11 2016 and has over 1 Million Downloads. Wow!
Most people think Google Duo is another application like Skype;
It’s a cross platform mobile application with an overly simplistic and easy to use UI that enables you make free video calls with other Duo users, and nothing else.
Designed to work with Google Allo, it is rumored to be Googles’ answer to Apple’s Facetime. It also provides the kind of end—to end—encryption seen in WhatsApp that ensures user privacy and data security.
Duo does not only work on Android smartphones, it’s also available for iOs (duh.. Apple).
Easier to use: Just input your number and you’re ready to go, you don’t even need to have a Google account before you can use Duo. A one time verification code is sent to your phone and you have a screen where you can make calls to your contacts provided they are available on Duo.
Conclusion: The simplicity of Duo and cross platform availability provides staggering competition for already widely adopted video calling apps like Facetime and Skype. Let the fanboys pray Google’s ingenuity (or name) and material-magic pushes it to first place.