The app ecosystem surrounding Apple and its products has “become an economy in and of itself,” Apple CEO Tim Cook said Monday in his WWDC keynote speech. What followed was a series of stats to show how big that ecosystem has become. Have a look yourself:

• 400 million customer accounts on the iOS App Store.

• 650,000+ apps are available in the iOS App Store, out of which almost one-third, 225,000 of those are made specifically for the iPad.

• App downloads have topped 30 billion app downloads.

• Over $5 billion paid to developers (Apple keeps one-third and pays two-thirds to the developer).

• The App Store is available in 120 countries as of now and this number will grow to 155 by the next month.

• More than 365 million iOS devices—iPhone, iPad, and iPod touch—have been sold since the platform launched.

• More than 80% of customers are running iOS 5, the latest version of the operating software, on their device. (Interesting to note that only about 7% of Android customers are running the latest version of the Android OS.)

• Since Apple integrated Twitter in iOS 5 last year, 10 billion tweets have originated in iOS 5, and 47% of all photos shared on Twitter originate in iOS 5.

• There are more than 140 million users of iOS 5’s iMessage service, and they’ve generated some 150 billion messages—and are currently generating more than 1 billion messages a day.

• The year-old Notification Center has produced more than 1.5 trillion push notifications, at a rate of 7 billion notifications a day. Forstall said 84 of the App Store’s Top 100 social apps now integrate with the Notification Center.

• More than 130 million people use iOS’s Game Center, submitting more than 5 billion scores each week. Two-thirds of the top 100 game apps integrate with Game Center, Forstall said.

WWDC itself is sporting some impressive numbers, Cook said: Attendees came from more than 60 countries to attend the conference’s 112 sessions and 125 labs.

Tagged as: Apple