Data mining - read nytimes

And a german article

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  • We tested 110 popular, free Android and iOS apps to look for apps that shared personal, behavioral, and location data with third parties
  • 73% of Android apps shared personal information such as email address with third parties, and 47% of iOS apps shared geo-coordinates and other location data with third parties
  • 93% of Android apps tested connected to a mysterious domain, safemovedm.com, likely due to a background process of the Android phone

https://techscience.org/a/2015103001/

This is why /e/ will be a success!