Third-party cookie-based marketing suffers in the Apple world. According to to a recent study by Marin Software, “website conversions on Apple’s iOS devices were not included in paid search metrics 80 percent of the time a third-party cookie was used for tracking.” That’s a huge swath of untapped data, and enough to destroy the accuracy of any brand’s marketing strategy.
“Mobile advertising is seeing tremendous growth right now, with the ads served on iPhones and iPads accounting for a significant chunk of that growth,” said Matt Lawson, vp of marketing and alliances at Marin. “Poor analytics due to cookie blocking could lead to undercounting mobile advertising revenues, and ultimately to under-investing in mobile.”
Coupled with possible legislative attacks on cookie-based tracking, the old ways of traditional ad buys and tracking are going the way of the betamax. The study also found that the Apple iOS conversion rates were on average 23 percent higher than those of Windows users, when adjusted for iOS undercounting. That means that Apple users are active consumers ripe for targeting, but they’re escaping the radar.
![]()
More in Media
A timeline of the major deals between publishers and AI tech companies in 2025
January 1, 2026
Here’s a list of all the major deals signed between publishers and AI tech companies in 2025.
No playbook, just pressure: Publishers eye the rise of agentic browsers
December 31, 2025
For the bulk of publishers, Google is, as ever, the one to watch. It’s already got agentic features within its Chrome browser, but that’s the tip of the iceberg, some say.
The biggest SEO lessons in 2025 for publishers
December 30, 2025
KPIs are changing, more AI search data is becoming available, and publishers are looking beyond search to grow their audiences and revenue.