Wall Street Journal: Many popular smartphone apps for iOS and Android share at least some of your personal data without your permission. The Journal found that 47 apps transmitted some details about the phones location, and that five shared age, gender, and other personal details. Ad networks can theoretically deliver more customized advertising based on what they learn about you. Macworld contributor and iOS developer says such concerns are probably overblown, relying on a somewhat broad definition of location Apple requires apps to ask permission to access that information in the first place.”]
Source: https://www.csoonline.com/article/2126512/wsj-s-concerns-over-app-data-sharing-overblown-.html