Apple iOS supports any class-compliant audio device that can be connected to it's operating system. The AR Series do not have the MFI (Made for iOS) interface, however any audio interface that works with the Camera Connection Kit may also work. It is not explicitly stated that the AR Mixers Series works with iOS, this doesn't mean it won't work, however you are subject to running in an unsupported configuration. (i.e. at your own risk).
We are unable to support this configuration with AR Mixers, if you decide to try this and run into performance issues, then moving to a support desktop or laptop system is recommended. The iPad / iPhone are designed to be an accompanying solution to the functionality of a MacBook Series or other Apple Series desktop solution (or PC Series laptop or desktop system).