iMaschine is by far one of the best apps on the iPod/iPhone/iPad for musicians. With the ability to sequence, sample and create incredible beats and develop complete songs, app users have perhaps an even more powerful program than you could get on a computer. Sure that is hard to believe, since there are excellent programs on computers, but when I talk about power I am referring to the ability to transfer creativity to simplistic development through music.
Go boot up your computer, wait 2 minutes, now boot up your program; in that amount of time you could find yourself laying down the complete sequence of music for a feature song, developing a new hip hop beat, or finalizing the first 16 bars of an incredible electro house set. Without a doubt iMaschine is priced right at $4.99 on the app store, meaning anyone can use it.