I already linked to Apple's own privacy policy on ads where they describe exactly this. If that's not a sufficient source, there's nothing better I could do. To

I already linked to Apple's own privacy policy on ads where they describe exactly this. If that's not a sufficient source, there's nothing better I could do. To quote: > We create segments, which are groups of people who share similar characteristics, and use these groups for delivering targeted ads. > We may use information such as the following to assign you to segments: > ... The music, movies, books, TV shows, and apps you download ... > ... The topics and categories of the stories you read and the publications you follow, subscribe to, or enable notifications from ... > ... Your name, address, age, gender, ... > ... your App Store searches and browsing activity ... > ... information stored on your device, such as the apps you frequently open ... There is absolutely no suggestion there that these segments would be per-app. In fact, they cannot be per-app given some of the data they say they're using is only collected from places with no ads. That is not an exhaustive list by the way, but just representative examples provided by Apple. The only data they explicitly promise not to use for ads targeting is: > No Apple Pay transactions or Health app data is accessible to Apple’s advertising platform