![]() Google ultimately achieved what it set out to do: Make it easier for people to quickly set up a video call on their phone. Overall, Duo is a simple and enjoyable video calling app that I can imaging being useful for families, children, and others that may not be very tech-savvy. Google says it hasn’t ruled out the possibility of bringing Duo to the desktop, but it’s focusing on mobile for now. But Duo is only available on mobile devices, unlike Hangouts, which can be used on both desktop and mobile. To me, desktop software is important for video chat apps, since some people might want to view their caller on a bigger screen. Or, Google could use this tech to make suggestions about who you might want to call based on your history, location, and time of day rather than just displaying recent calls. There’s opportunity to use machine learning to translate speech in real time when chatting with someone in a different language, like Skype does. ![]() Google is a powerhouse when it comes to machine learning and artificial intelligence I’d love to see the company leverage that technology in Duo. While Duo’s simplicity is what makes it appealing, it would benefit from a few additions. The last thing I’d want is to see my caller poking and prodding at their screen or reading something else while we’re in the middle of a conversation. This was jarring at first, but I think it’s generally helpful. I noticed the same thing when my caller tried to check his notifications while in a video call. When I swiped up to access my iPhone’s Control Center during a video call, the app blocked out my face with a blank gray screen. Google also blocks what viewers can see when one party to a call navigates away from the app. ![]() Knock Knock is optional, so if you find yourself in that situation, you can turn it off in the app’s settings. But I could also imagine it being awkward if you’re reaching out to someone you don’t know very well. It’s a fun little feature if you’re calling friends or loved ones. For the iPhone, this feature only works when the app is open. It only works with numbers saved in your contacts, so it’s impossible for strangers or unwanted callers to reach you through Knock Knock. Google is pitching this as a way to seamlessly dive into a call without the awkwardness of asking whether or not the other person can see you. This lets the recipient see a live video of the caller before answering. The acquisition is Cisco’s largest since it bought AppDynamics for 3.7 billion in 2017. The one capability that separates Duo from most video calling apps is a feature Google calls Knock Knock. Duo Security provides cloud-based tools to prevent security breaches on devices.
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