Cook did not specify whether that number represented people who use the Apple News app on a regular basis or if it simply measured the number of people who have accessed the app at one point or another, so it's still difficult to gauge the popularity of Apple News.
Introduced alongside iOS 9, Apple News was initially restricted to the United States, but with the launch of iOS 9.1, Apple News expanded to the UK and Australia for the first time.
Apple News is an all-new app for iOS 9 that's designed to aggregate stories from a wide range of sources into a single mobile-friendly format for the iPhone and the iPad. It's similar in design to magazine-style news apps like Flipboard and Zite and replaces the previous Apple Newsstand app.
Apple has partnered with dozens of publications for Apple News, like The New York Times, CNN, ESPN, The Atlantic, The Daily Mail, Slate, and more. To get the latest news and rumors from MacRumors, make sure to add MacRumors to Apple News by clicking the link.