For those that do not know about this new app, Duo is a one-to-one video calling app for everyone which is designed to be simple, reliable and fun, so you never miss a moment. Some of its selling points are its simple interface, end-to-end encryption, and the fact that it works seamlessly even with poor network connections. It’s for mobile only, there is currently no desktop app or web version and operates on both iOS and Android.
» 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 answer with Duo’s live preview feature.
» High-quality video: Experience faster and more reliable video calls whether you’re on Wi-Fi or on-the-go.
» Cross-platform: Video call all your friends across Android and iOS with just one simple app.
All you need is phone number. It has not been rolled out yet, but will soon be rolled out to all countries in a few days from now. Keep checking the Android and IOS stores for update.