Acceptance rate for all apps that showed an alert: The

Acceptance rate for all apps that showed an alert: The percentage of app users who approved app tracking, among iOS 14 and above users, who chose to approve or disapprove app tracking, either directly through iOS privacy settings or after requesting the app, among all apps that showed an ATT alert. We estimated the number of apps displaying an ATT warning by including only those apps for which more than 1% of active users with iOS 14 or higher approved tracking. All-app acceptance rate: the percentage of app users who approved tracking among app users with iOS 14 or higher who chose to approve or deny app tracking. In other words, we count app users rather than individual users, which means that the same user who selected the tracking option for two apps is counted twice. Percentage of limited app tracking: The percentage of app users with iOS 14 or higher who cannot select a tracking option and cannot be tracked by default. We set a threshold of 1% for the percentage of users, which allowed us to exclude internal testing or very limited ATT deployment for end users. Note that you can disallow tracking for a specific app using the prompt or for all apps by disabling the Allow apps to request tracking option in the iOS privacy settings. This metric is useful for app developers who want to estimate their opt-out rate, as it is calculated specifically for apps where the prompt was displayed. We calculated the opt-out percentage for both all apps and those where the ATT prompt was displayed. Application tracking opt-out for all app users who had already opted in. Because the opt-out rate is expected to be low, this change is expected to affect the entire mobile ecosystem and create problems for personalized advertising and attribution that will impact the $189 billion global mobile advertising industry. With the release of iOS 14.5 in late April, iOS app developers must now request permission to track their users outside of the app they are using.