Pandora Radio

Pandora Radio ( P) is the top music app for Apple, with millions of listeners. Pandora's stock hasn't performed well this year, however, as it has fallen 14% year to date.

Flashlight

Flashlight does exactly what you think it does. It turns your iPhone into a flashlight, by keeping the back camera light open. It's a great app to have, but you have to watch the battery usage on it.

Facebook Messenger

Another Facebook app is one of the top apps for iOS this year, with Facebook Messenger joining the list. With the app, you can message a friend or start a group conversation, get push notifications, know who has seen your messages and include your location and share photos.

Twitter

Twitter is another major social network that's one of the top 10 free apps of 2012. I predicted that Twitter files to go public in 2013, with an actual IPO happening in 2014.

Pinterest

Pinterest, the popular photo-centric social network, is also on Apple's list of top free apps. In May, the San Francisco-based Pinterest raised $100 million, giving it an implied valuation of $1.5 billion.

-- Written by Chris Ciaccia in New York

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