Popular Internet radio app, TuneIn Radio Pro, has disappeared from the App Store.

We think Apple might have pulled the the app due to its recording functionality which allowed users to easily pirate songs or any other copyrighted material that plays on the radio. This is also a feature not available in the free version of the app, which, has not been removed from the App Store.

TuneIn Radio Pro had an average four star rating with over 199 reviews and boasted an impressive 50,000 radio stations for streaming. It even received our highest recommendation in the AM/FM Radio Apps and Best Radio Apps, AppGuides.

We are still investigating the matter and will keep you posted when we hear more.

UPDATE:

It now appears to be back in the store. We are trying to figure out why it had a brief AWOL.