We doubt you've wasted much time contemplating which iOS apps are the most popular, but Apple wants to tell you anyway. Over the past year Cupertino's been keeping its greatest hits up to date in the App Store, and it's made another adjustment to the page in celebration of reaching the 25 billion download mark. The best of the best shouldn't come as much of a surprise -- Angry Birds and its 12 versions are in there, as well as Fruit Ninja, Pandora and Facebook. But if you're even the slightest bit curious as to what else made it to the top of the charts, fee
