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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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.
Citation formats
iOS 14.5 share of IDFA in selected app categories before and after ATT launch 2021
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.
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comScore. (June 22, 2021). 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 [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 16, 2026, from /statistics/1284519/idfa-ios-145-selected-app-categories/
comScore. "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." Chart. June 22, 2021. ÌÇÐÄÆƽâ°æ. Accessed July 16, 2026. /statistics/1284519/idfa-ios-145-selected-app-categories/
comScore. (2021). 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. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 16, 2026. /statistics/1284519/idfa-ios-145-selected-app-categories/
comScore. "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." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 22 Jun 2021, /statistics/1284519/idfa-ios-145-selected-app-categories/
comScore, 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 ÌÇÐÄÆƽâ°æ, /statistics/1284519/idfa-ios-145-selected-app-categories/ (last visited July 16, 2026)
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 [Graph], comScore, June 22, 2021. [Online]. Available: /statistics/1284519/idfa-ios-145-selected-app-categories/
