According to Apple CFO Luca Maestri, the App Store remains "incredibly popular" with customers around the world, and in the March quarter, it saw 70 percent more revenue than Google Play.
Apple also an update on HealthKit-based apps, which are part of Apple's recent health and fitness initiative, aggregating all of a user's health and fitness data. According to Cook, HealthKit has been highly successful, and there are now 1,000 HealthKit-based apps in the App Store.
Along with HealthKit, Cook also touched on apps for the Apple Watch. There are now 3,500 Apple Watch apps available for download. Cook said customer response to the Apple Watch was "overwhelmingly positive" and that Apple "can't wait to see more inspiring apps" for the Apple Watch as we creep closer towards the 2015 Worldwide Developers Conference.