Despite recent app privacy changes, Apple customers are still tracked at alarming rates
URLgenius, which tracks clicks and app-opens, used the Record App Activity feature that was part of iOS 15.2 to see what network domains 200 apps in 20 app categories were connecting to. They discovered that on average apps were connecting with 15 domains and that 80% of those were to unfamiliar 3rd party domains. This was despite customer preference not to be tracked.