Facebook's mobile advertising spending on Android grew by ** percent in July 2021 compared to the same period in the previous year, whereas for iOS it increased by ** percent in the same period. This divergence in growth came following Apple's changes to its identifier for advertisers (IDFA), which came into effect in April 2021.
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eMarketer. (November 5, 2021). Change in Facebook mobile advertising spending in the United States from April to September 2021, by operating system (OS) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 22, 2026, from /statistics/1240240/facebook-mobile-ad-spend-change-os-us/
eMarketer. "Change in Facebook mobile advertising spending in the United States from April to September 2021, by operating system (OS)." Chart. November 5, 2021. ÌÇÐÄÆƽâ°æ. Accessed July 22, 2026. /statistics/1240240/facebook-mobile-ad-spend-change-os-us/
eMarketer. (2021). Change in Facebook mobile advertising spending in the United States from April to September 2021, by operating system (OS). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 22, 2026. /statistics/1240240/facebook-mobile-ad-spend-change-os-us/
eMarketer. "Change in Facebook Mobile Advertising Spending in The United States from April to September 2021, by Operating System (Os)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 5 Nov 2021, /statistics/1240240/facebook-mobile-ad-spend-change-os-us/
eMarketer, Change in Facebook mobile advertising spending in the United States from April to September 2021, by operating system (OS) ÌÇÐÄÆƽâ°æ, /statistics/1240240/facebook-mobile-ad-spend-change-os-us/ (last visited July 22, 2026)
Change in Facebook mobile advertising spending in the United States from April to September 2021, by operating system (OS) [Graph], eMarketer, November 5, 2021. [Online]. Available: /statistics/1240240/facebook-mobile-ad-spend-change-os-us/
