Almost two weeks after iOS 14.5 started offering the choice of opting in to App Tracking or opting out, analytics data provides the unsurprising evidence that vanishingly few Americans are choosing to allow it.

Until now, apps have been able to rely on Apple’s Identifier for Advertiser (IDFA) to track users for targeting and advertising purposes.

With the launch of iOS 14.5 this week, mobile apps now have to ask users who have upgraded to iOS 14.5 for permission to gather tracking data.

With opt-in rates expected to be low, this change is expected to create challenges for personalized advertising and attribution, impacting the $189 billion mobile advertising industry worldwide.

Flurry Analytics, owned by Verizon Media, is used in over 1 million mobile applications, providing aggregated insights across 2 billion mobile devices per month.

For this report, Flurry will be updating every weekday by 10am Pacific Standard Time the daily opt-in rate.