Would you share personal information such as your address, phone number, whereabouts, addresses of friends, the apps you use, messages you read or websites you have visited with total strangers? Hardly likely. However, advertising networks may have had this data for a long time, and even more: You can probably read out your browser history, access your photos, know your user IDs and observe which advertisements you are viewing and which products you are buying.
Some companies even know how much you earn and how your health is doing. Ad networks sell this data on and often the same APIs are stuck in several apps that are installed on your devices so that their manufacturers can also read this data. A privacy nightmare. Apple wants to end it.
iPhone and iPad users will often have to answer questions in the coming weeks and months, at least if they are using at least iOS 14.5 and / or macOS 11.3: When an app is opened for the first time after the update, the system checks the data protection setting and asks ask the user whether tracking is actually desired, for example: “Can Facebook record your activities in apps and on the websites of other companies?”
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