Google Duo
Google Duo Duo is a one-to-one video calling app for everyone – designed to be simple, reliable and fun so you never miss a moment. 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. High-quality video Experience faster and more reliable video call 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. Official website https://duo.google.com/