Google is launching a new video calling app for Android and iOS called Duo. As the name suggests, it’s designed for one-on-one video calls, and Google says it offers a simple user interface, high-quality video even on slow networks, and end-to-end encryption.

But it also has a few features that make it unlike most video calling apps, including the ability to see a preview of the person calling before you even pick up.


Google calls the preview feature “knock knock,” and it’s sort of like next-gen caller ID, giving you a sense of what to expect as soon as the phone rings.

Like the new Allo messaging app, Google says Duo will be available starting this summer.

It uses a new internet video protocol called QUIC, which was developed by the folks who designed the WebRTC protocol for audio and video communication over the web.

Support Liliputing

Liliputing's primary sources of revenue are advertising and affiliate links (if you click the "Shop" button at the top of the page and buy something on Amazon, for example, we'll get a small commission).

But there are several ways you can support the site directly even if you're using an ad blocker* and hate online shopping.

Contribute to our Patreon campaign


Contribute via PayPal

* If you are using an ad blocker like uBlock Origin and seeing a pop-up message at the bottom of the screen, we have a guide that may help you disable it.

Subscribe to Liliputing via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 9,447 other subscribers