Review of Google Duo powered by the Slant community.
Duo is a one-to-one video calling app for everyone – designed to be simple, reliable and fun so you never miss a moment.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Works well even on bad networks
If can switch between Wi-Fi and GSM network on the fly during a call and adapt audio/video (even drop video) if necessary during a call.