Apps like TikTok can know which username we logged in with, even if we uninstall and reinstall the app. This is egregious, as many companies like Facebook have SDKs embedded in many apps, allowing them to accurately interconnect user activity.
Apple should be ashamed that they aren't putting effort to randomize these fingerprints....
That’s just keychain. It’s not even fingerprinting.
This is probably Keychain, right?
Probably, the most stupid thing with apple is there is no way to clear this keychain AFAIK without resetting whole phone.