Top free Apps like Google Duo for iPhone
Google Duo Free
Simple and reliable one-on-one video calling between mobile devices
Google enters the video calling market with its product: Duo. This innovative product is added to Google's roster of communication tools to bring the grand total up to four, but Google Duo does several things better than the other tools. Duo, along with the rest of Google's communication tools, are free to download on Android and iOS devices alike.