Austrian privacy activist Max Schrems’ NOYB Organization says Default on iPhone Breaks EU privacy laws. Identifier for Advertisers, or IDFAs, are automatically generated for each iPhone so that Apple and third parties can identify users across applications and connect online and mobile behavior, which is called “cross device tracking” NoYB says this type of online identifier acts like a cookie as defined under the so-called EU Cookie Law, which means it requires the user’s informed and unambiguous consent.”]
Source: https://www.govinfosecurity.com/privacy-group-files-complaint-over-ios-tracking-a-15380