US Opt-In and Adoption Rates for App Tracking Transparency (ATT) and iOS 14.5, Dec 2021 (% of users)
Data is from a December 2021 AppsFlyer report titled "The Impact of iOS 14+ & ATT on the Mobile App Economy." The data sample in this report was composed of 4,002 apps that implemented app tracking transparency (ATT) and 37 million instances in which users saw the ATT prompt and chose whether to allow or deny "tracking" in the past week (Dec 13-19, 2021). All data used in the report is measured by AppsFlyer, the leading mobile attribution and marketing analytics company that measures the effectiveness of its clients’ app marketing campaigns. This is done via integrations with leading media partners, as well as its proprietary SDK implemented in its clients’ apps. All data is anonymous and aggregated.