More than four billion apps have been downloaded from the Apple App Store and more than 185,000 apps are available to consumers in 90 countries, Apple CEO Steve Jobs said at a special event at its Cupertino, California headquarters.

Over 85 million iPhone and iPod touch users around the world can choose from a range of apps in 20 categories, including games, business, news, sports, health, reference and travel. Jobs also said that Apple has sold 50 million iPhones and 35 million iPod touches.