1. I can not imagine the users, children and teens, have full informed consent.
2. I feel dirty reading this article. No app (maybe antivirus) should install a root cert. This is terrible invasion of privacy and misuse of user trust.
3. No, just no.
Facebook pays teens to download Research app with root access outside App Store Facebook pays teens to download Research app with root access outside App Store https://techcrunch.com/2019/01/29/facebook-project-atlas/
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