Google Duo is a video calling app that offers a simple and reliable experience for users. It’s designed to work across platforms, providing high-quality video and audio calls with ease. One standout feature is its Knock Knock function, which allows users to preview the caller before answering. Duo is also known for its simplicity, as it doesn’t require a Google account, making it easy for anyone to use. Whether for personal or professional calls, it stands out in the competitive landscape of video communication. The app has garnered positive feedback on the google review platform highlighting its usability and reliability.