This shouldn't shock any app lover. As per a latest report, more than 40 billion apps were downloaded from Apple App Store till date of which around half of the same was download in the year 2012.  Around 2 billion copies alone were downloaded in Dec 2012. Most of these apps were downloaded for iPhones, iPads, and iPod touch devices. Some apps like the Temple Run game from Imangi Studios was downloaded more than 75 million times. DragonVale and Clash of Clans combined brought $100 million for Apple.

Also, in return Apple paid millions of dollars to the app developers which as per Apple has crossed over 7 billion dollars. 

Currently, Apple has over 500 million active accounts at the App Store, which is stocked with more than 775,000 applications for iPhones, iPads, and iPod touch devices. 

Apple App Store currently functions in 155 countries. Hopefully....more countries will be added in the near future.