Apple began inviting developers participate in a beta program for App Analytics, an other unannounced service that gives developers more information about how and how often their customers are engaging with their apps. The invitation was posted to Twitter by developer Ryan Hoover (via TechCrunch), and is limited on a first-come, first-serve basis.
According to the invitation, Apple's App Analytics would allow developers to see traffic numbers to their app's page in the App Store, find out how many users open the app over time, check both app sales and In-App Purchases, create and monitor advertising campaigns, and see which external websites refer the most users.
Apple has largely left app analytics to third parties—Flurry and App Annie are two of the biggest. Apple acquired one of those companies—Burstly—in 2014. Burstly was best known for TestFlight, an app testing platform, but as noted by TechCrunch, the company also ran an analytics service called FlightPath.
Expect more information to surface during June's World Wide Developer Conference.