alt Hacker NewsNobody has explained to me how iOS ad SDKs across different apps can track individual users given that there hasn't been an accessible GUID on iOS for many years now.
Nobody has explained to me how iOS ad SDKs across different apps can track individual users given that there hasn't been an accessible GUID on iOS for many years now.
Enough location data becomes effectively unique: There is likely only one phone in the world that averages over X nighttime hours in my apartment-complex and averages over Y workday-hours in the the same office block where I work.
That kind of pattern can be used to determine that two or more different app-identities are the same person, and anybody buying that data has a strong incentive to try it.