Google Unveils Simple Video Calling App 'Duo' to Rival FaceTime

Google has released Duo, a new video calling app aimed at providing a simple and reliable experience for one-to-one conversations. Unlike Hangouts, which is currently Google's standard-bearer for video conferencing, Duo is not linked to your Google account and uses your phone's contact list instead.

The simplicity of Duo is evident from the moment you launch the app, with a clean interface that shows your face on the main screen alongside your call partner. The app prioritizes speed and reliability, using WebRTC, a video standard developed by Google, to ensure smooth connections even over slow mobile networks.

Duo's unique feature, Knock Knock, allows the caller to send video before the recipient accepts the call, encouraging gesturing and facial expressions to get attention. This feature is defeatable, but it adds a fun and distinctive touch to the app.