Google Duo vs Viber
Last updated: March 09, 2018
Google Duo is the new, simple video calling app that brings you face-to-face with all the people that matter most.
Viber is a mobile app that provides free international calls and text messages to other Viber users using 3G or Wi-Fi. Uses your existing contact list - check out which of your phone contacts and friends is already on Viber so that you can call and text them for free.
Viber has better video than Google Duo