Ad attribution muddles mobile cash

Mobile app marketers are spending into a bigger market with blurrier scorekeeping, four years after Apple forced apps to ask permission before tracking users across other apps and sites. (developer.apple.com, appsflyer.com) Apple’s App Tracking Transparency framework, introduced in 2021, requires user permission for cross-app tracking, while its SKAdNetwork system returns privacy-preserving campaign data instead of user-level logs. Apple’s developer docs now point advertisers toward AdAttributionKit for App Store campaigns as the privacy-first replacement path. (developer.apple.com, developer.apple.com) That change left marketers stitching together results from consented tracking, Apple’s aggregated signals, and their own internal data. AppsFlyer said in January 2026 that paid install share rose 10% year over year while ad impressions climbed 20%, increasing the volume of signals teams have to interpret. (appsflyer.com, appsflyer.com) The money involved is large. EMARKETER says U.S. advertisers are allocating 66% of digital media budgets to mobile in 2025, and AppsFlyer said global gaming app user-acquisition spend reached $25 billion in 2025, with nearly half flowing into the U.S. (emarketer.com, appsflyer.com) AppLovin has been one of the clearest winners from that reshuffle. Its advertising revenue rose 75% to $3.22 billion in 2024, then another 70% to $5.48 billion in 2025, according to its February 2025 and February 2026 earnings releases. (investors.applovin.com, investors.applovin.com) Measurement companies say the basic problem is that more ad dollars are chasing fewer clean identifiers. Singular said global ad spend jumped 24.4% in Q3 2025 while initial App Tracking Transparency opt-in rates were still 9.1%, leaving marketers to pay more for users they cannot measure with the old precision. (singular.net) AppsFlyer, which sells attribution tools, argues the market has adapted rather than collapsed. It said in 2025 that global opt-in rates had reached 50%, up 10% since App Tracking Transparency’s rollout, and described the industry as shifting toward “more transparent, consent-based relationships” with users. (appsflyer.com) Marketers still have to decide where to place user-acquisition budgets before the reporting catches up. AppsFlyer said iOS gaming advertisers increased the number of media sources they used by as much as 15% year over year in 2025, a sign that buyers are spreading spend across more channels to find incremental scale. (appsflyer.com) The result is a mobile ad market that is still growing fast, but with returns measured through partial, delayed, and often conflicting signals. In that setup, the biggest platforms can keep taking share while smaller advertisers keep guessing which installs actually paid back. (appsflyer.com, singular.net)