A growing number of iOS apps currently collect location data, WiFi network IDs and other data, from iPhone users and sell them to advertising companies. The Guardian app research team found that all these apps have embedded tracking codes provided by advertising and marketing firms. The report also includes the names of 100 news apps containing monetization code provided by data monetization firm RevealMobile. In many cases, the packaged tracking code may run at all times, constantly sending user GPS coordinates and other information. The apps usually present a plausible justification relevant to the app in the Location Services permission dialog.”]
Source: https://securityaffairs.co/wordpress/76056/breaking-news/ios-apps-collect-data.html