IDFA (Identifier for Advertisers)

Founded 2012

AAPL

Sourced & current · updated Sep 28, 2026

Apple’s device advertising identifier, gated behind App Tracking Transparency consent since 2021.

Where they sit

Identity ResolutionPrivacy Technology

The primary device-level advertising identifier for Apple iOS devices, now gated behind user consent and significantly reduced in availability across the mobile ad ecosystem.

Ownership

Parent: Apple Inc.