IDFA collection in selected app categories 2021| Statista

As of June 2021, the number of tracked Identifier for Advertisers (IDFA) in selected app categories had experienced a decrease compared to before the introduction of Apple's App Tracking Transparency protocol in iOS 14.5. Sports apps, which previously reported a 30.6 percent share of tracked IDFA, saw less than 16 percent of the tracked identifier after the release of the iOS 14.5.

Share of tracked Identifier for Advertisers (IDFA) in selected app categories before and after the introduction of Apple's App Tracking Transparency protocol in iOS 14.5 as of June 2021

Characteristic	iOS pre-14.5	iOS 14.5
Sports	30.6	15.7
News/Information	65.5	2.2
Entertainment	53.8	0
Real Estate	68.6	0

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Release date

June 2021

More information

Region

Worldwide

Survey time period

June 2021

Supplementary notes

According to the source, data represent the "share of Identifier for Advertisers (IDFA) based on total Identifier for Vendors (IDFV) observed. IDFVs can represent the total number of unique devices per publisher app"

The source does not provide an exact survey date. The date provided is the publication date.

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