The developers of the popular FruityLoops digital audio workstation (now known as FL Studio) have released a mobile version for the iPhone, iPod touch, and iPad. FL Studio Mobile lets you create music on a mobile device with 133 instruments and drum kits, a configurable virtual piano, drum pads, digital effects, and a 99 track sequencer.
You can also export mobile projects to edit using the desktop version of FL Studio. Unfortunately you can’t use FL Studio Mobile to edit projects created on the desktop.
via 9 to 5 Mac