This is awesome controller, works on iOS and android smartphones and tablets
http://hexler.net/software/touchoscYou can create and edit any interface with any types of controls for any software, which support OSC and MIDI protocols.
I use Akai APC40MK2 as main controller, and ipad as second controller just for quickFX.
You can try my templates. Thanks!
http://www.filedropper.com/touchosc Interface touchosc on the ipad retina screen.