App Tracking Transparency requires apps to explicitly ask permission before tracking a user’s activity across other companies’ apps and websites, a shift away from tracking being enabled by default.
Privacy labels on App Store listings summarize what data an app collects before it is even downloaded, giving users a way to compare apps on privacy grounds.
These tools do not eliminate tracking entirely — apps can still collect data with permission or through their own first-party analytics — but they meaningfully reduce cross-app profiling.