In the ocean of the social networking services, especially among dekstop-based users, Facebook is quite popular. And it also goes with mobile users. It’s reported that Facebook for iPhone is the service’s most popular application.

Facebook have revealed that, out of its 4 million daily mobile users, their Facebook for iPhone mobile client sees approximately 1.64 million daily active users, compared to the Facebook for Blackberry app which has has approximately 1.56 million daily users.

Launched and hit the App Store at July last year, Facebook for iPhone client could access to more technology than Facebook iPhone websites. With the native application, for example, you can take photos and upload them instantly to your Mobile Uploads album on Facebook.

Facebook for iPhone works with the original iPhone, iPod Touch, and iPhone 3G. You can download the application for free from Apple’s App Store on iPhone and iPod touch or at www.itunes.com/appstore/