Google Duo is the highest quality one-to-one video calling app. It's simple, reliable and works on both iOS and Android phones. Features: Simple interface. Pick a loved one and jump right in, with a simple interface that brings video to the forefront. Knock Knock. See the caller before you pick up with Duo's live preview feature. The highest quality video calling app.
Google is replacing Hangouts with Duo on Android devicesNews
