I just shared a version of my reface CS editor for iPhone. Again this is based on MIDI Designer and allows me to operate all those system settings, which you normally change using the "switch off-press and hold key-switch on" procedure. I also added the two buttons for overall changes, which I use mostly: playing locally (local on, speakers on) and playing via my DAW (local off, speakers off).
I skipped the second page of the iPad layout providing the sound controls, they would have been just too tiny on the iPhone screen. Anyway easier to use the hardware controls on the synth itself.

http://mididesigner.com/qa/5644/layout-reface-cs-system-editor-for-iphone