Apple App Tracking Transparency
Apple App Tracking Transparency (ATT) is a privacy framework introduced by Apple in iOS 14.5, iPadOS 14.5, and tvOS 14.5 that requires apps to obtain explicit user permission before tracking their activity across other companies' apps and websites for advertising or data-sharing purposes. It enforces a system-level prompt where users can choose to allow or deny tracking, and apps must respect this choice, with non-compliance risking rejection from the App Store.
Developers should learn and implement ATT when building iOS, iPadOS, or tvOS apps that use tracking technologies like the Identifier for Advertisers (IDFA) for targeted advertising, analytics, or data monetization, as it is mandatory for App Store approval. It is crucial for apps in advertising, social media, e-commerce, or any domain relying on cross-app user data, helping ensure compliance with privacy regulations like GDPR and building user trust by transparently handling data.