What you are seeing is the same number of faders on a 4S iphone. The iphone 5 and 6 have longer screens. The ipad is shaped more like a larger version of the 4S. (5 channels vs 7 channels on my iphone 6) Actually the app looks much better on my 6 than the 4S. I especially like the whiter level numbers. Hope they'll copy that over to Master Fader at their next update.