Collects and sells data
The app tracks your location
Unable to be monitored
Allows video chatting and direct messaging
What Google Duo says, "Google Duo is the highest quality video calling app. It’s simple, reliable, and works across Android and iOS phones and tablets, smart devices, and on the web."
What SGS says, "There are a number of video chatting options available online. Good for personal video chatting. Try something else for businesses and professional use."