http://www.head-fi.org/t/619911/cardas-audio-introduces-the-cardas-clarifier-iphone-app I got this app at the Apple App store, and it ran OK on my ipad, but I get the sense that some users think it's some kind of gag. The source looks legitimate.
According to Stereophile "But for 99 cents, there is now no reason for skeptics not to try it for themselves." I can think of one reason for sceptics not to try it for themselves. They will save 99 cents!