Google Duo video chat app: How it compares to FaceTime
Google Duo now supports eight-person video calls - The Verge
How does Google Duo compare to Skype and Facetime?
Google's Duo is another video chat service taking on Facetime, Skype - CNET
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Google Duo and Meet are merging as Google's strategy for communication apps continues its haphazard evolution - Liliputing
How to make a video call with the Duo app on a Galaxy phone
Google Duo: How does Google's version of Facetime compare? - The American Genius
FaceTime vs. Google Duo Comparison
Google is letting you know that its Duo app has a major FaceTime feature - PhoneArena