Pinchmedia recently announced new report regarding IPhone applications ^[1] (take a look at the previous one here ^[2]). They counted free and paid applications in each category. Guess what the results are:

^[3]

News and social networking are disproportionately free, since it's difficult to charge for content that's freely available elsewhere and social networks grow in value with the number of participants. Entertainment and games are disproportionately paid, reflecting a belief that people will pay money to have fun. Since the AppStore's applications are disproportionately entertainment and games (helped along by a lot of $0.99 e-books), the AppStore's applications are predominantly paid. The most common price for an application in the 'games' category is still $9.99, although the second-most common price is $1.99.