Out of curiosity, I reviewed the App Store guidelines: https://developer.apple.com/app-store/review/guidelines/#legal https://developer.apple.com/app-store/revi

Out of curiosity, I reviewed the App Store guidelines: https://developer.apple.com/app-store/review/guidelines/#legal https://developer.apple.com/app-store/review/guidelines/#leg... The Legal Section states: "Apps must comply with all legal requirements in any location where you make them available (if you’re not sure, check with a lawyer). We know this stuff is complicated, but it is your responsibility to understand and make sure your app conforms with all local laws, not just the guidelines below. And of course, apps that solicit, promote, or encourage criminal or clearly reckless behavior will be rejected. In extreme cases, such as apps that are found to facilitate human trafficking and/or the exploitation of children, appropriate authorities will be notified." There is also a sub-section, which states: "(iii) Apps should not attempt to surreptitiously build a user profile based on collected data and may not attempt, facilitate, or encourage others to identify anonymous users or reconstruct user profiles based on data collected from Apple-provided APIs or any data that you say has been collected in an “anonymized,” “aggregated,” or otherwise non-identifiable way." Obviously, with HK and China, the stringency of Apple adhering to their guidelines on decisioning is politically contentious. From a broader perspective though, there is something about this type of app functionality that is interesting for other cases - What are Apple's rules about app users tracking other people without their knowledge/consent, and then sharing that information with others? This is also important because it influences levels of privacy protection. As a low-level example, Waze tracks locations of police, cameras, roadwork, etc., which helps drivers avoid tickets for speeding (generally, this seems pretty accepted and I don't know of any major complaints). However, say I have an app that tracks celebrities, musicians, businesspeople, athletes, etc., and I share that location data on a live map for others to see, and also contribute to. I imagine that would not go over too well with the people being tracked, even if they were being tracked out of admiration. This presents its own set of problems too for app abilities.