Can I use this on an iPhone 4S (running iOS 6)? Can it be used on an iPad? In each case it would be to work with a MacBook Pro running either Keynote or Powerpoint. I want to be able to skip to certain slides as they are selected by the audience and be able to do it seamlessly without returning to my laptop. If I could use my phone or iPad as a remote to do this, it would be good. Do you think this would work for my application?