DJay and djay remote for mac

I love my mac and my iphone. I also love dancing and music. Enter djay software. I'm not a professional disc jockey, far from it. I just wanted an easy to use application that can offer me some fun mixing of music. The other thing it offered was that it allows for tempo control, which is really useful when learning steps for a particular song. You can just slow it down when you first are learning, then gradually take it up to speed. I don't use that feature, but my girlfriend does for her studio, Beyond Just Dance Studios, when she is choreographing. The only downside is that it requires OS 3.1 or better on the iphone, which I don't have because I love tethering too much. But that just means I have to get an ipad! I knew I'd find a use for one eventually!