Due to the rise in people using mobile devices to access Facebook. It's had a big impact on Facebook's revenue. So they've decided to open their own app store to bring in the much needed revenue in the mobile market.
More than 600 apps - including games such as Electronic Arts' The Sims, utilities such as video app Socialcam and social sharing services like Pinterest - have made the initial cut. The service will first be available to the US, with other countries to follow.