I am now using this app and it is the best thing ever! I bought my ipod touch just to use it and I haven’t been disappointed. I can use ANY of my fitness music for all of my classes, and I teach both Seniors (slower) and Hi Lo and Step which are much faster. Now I just bring my ipod, no CDs, and decide the bpm I want to use for my class on the spot! I think this is the next best thing to the fitness music itself.
Gail DiBernardo about Tempo Magic, v1.2.1