New 'Duo' video-calling app faces stiff competition
(Newser) -
Knock knock, Google's video-chatting app has arrived. The app, dubbed Duo, represents Google's response to other popular video-calling options, including Apple's FaceTime, Microsoft's Skype, and Facebook's Messenger app. Duo isn't much different from the other video-chatting services, except that it gives a glimpse at...