Yeah, Algoriddim currently owns the iDevice DJ market with their purpose-built apps. In order for Mixxx to be ported, all of our dependent libraries would need to be ported first, the biggest of which is Qt. Some work has been done on that by the community (this looks promising: http://www.qt-iphone.com/Introduction.html
) but nothing official AFAIK.
Mixxx Developer - Controller Specialist
Mixxx Windows package maintainer