Facebook, Angry Birds

In 2010 social networking application Facebook gets the award for the most popular free iPhone application in the US and bird-catapulting game Angry Birds is the most popular paid application.

The full list of 2010's most popular iPhone Apps

For the full list of 2010's most popular iPhone Apps, including the most popular applications in each category in the App Store, head to the App section in iTunes and click on "Rewind 2010: iPhone Apps."Happy app downloading!