The much anticipated release of the Amidio Touch DJ application has finally been approved by Apple for sale in the App Store and it is sure to be a top seller in no time at all.

The app enables users to mix two tracks without ever hearing one second of the song and has some special features that are pretty incredible for being use on a phone.

DJ app’s have apparently been blocked for the iPhone for quite some time and nobody is really sure why. There has been a multitude of applications and every one of them has been turned down to this point. Whether Apple is scared that the applications will hurt their iPod sales or not is unclear as they have been pretty tight lipped about everything so far. However, users have been sending letters and petitions about approval for some type of app and Apple has finally given in.

The Amidio Touch DJ app will retail for $19.99 in the app store and is pretty amazing. Two separate tracks can be pulled up and compared via the sound waves that are generated. Mixers should be able to combine the tracks by visually matching the waves. At least that is the theory behind the whole thing.

While there is a lot of upside to this app, there are also some small roadblocks that Apple has in mind for its users. For instance, if the user wants to pre listen to the songs before they have been mixed, they must buy a splitting adapter to do so. They also cannot access their current library. Any songs that they want to use in the app must re-imported through another utility on the iPhone.

Even though there are some limitations, there are also a lot of special effects that can be used within the app itself that make this well worth the money. The fact that it is the only true DJ application that is usable on the iPhone doesn’t really give us a choice though if we want to use the iPhone as mixer for our iTunes library. However, Amidio did a great job with the obvious restrictions that Apple put on them to get this approved.