From an engineers standpoint.
The only thing I can see this app being good for is for rappers to test rap ideas, not for anything serious. 2 reasons from me are, it outputs mono files, so theres no stereo width possible, and it cuts the high end completely out. 10kHz and up. Thats killing the possible clarity for the song. I did a quick master for one of my friends songs he did with this app and there was absolutely no high end, too much bass and more problems. Too overly compressed songs. I gave the app a 2 star because it has a use for practicing rapping.
Mapper724 about
Rap to Beats