Misleading, useless for my device

I purchased this app to use with my 2nd gen iPod Touch running OS 4.2.1. Apparently I need a newer version of the software in order to run it on my iPod, and nowhere does it state minimum system requirements. Basically it stole my money for a product I cannot use. Oh, and I used to have it on my iPod, but now use another account and bought it so that it would work. (By the way, NanoStudio, one of the most complex apps for iOS works totally smoothly on my 2nd gen iPod Touch. This is just sloppy programming.)

sadfgasdfgh about Slow Down Music Trainer, v3.4