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Dozens of iOS apps caught quietly selling localization data to marketing firms

On the day Apple was forced to remove a popular app from the Mac App Store because it was sending user data to a Chinese server, comes word that dozens of popular iPhones apps are sharing location data of "tens of millions of mobile devices" with monetization firms. As uncovered by researchers at the GuardianApp Project, all of the apps identified collect user location data to work correctly, such as weather and fitness apps. In this case, they're using this received data to increase revenue.