Is there an App downloadable from iTunes that will act as a shutter release for a full frame Nikon. Nikon have this app called Nikon Mobility Utility or something that like that and its pure dirt. A) I'm looking for something that just works via infra red or if it is wifi then not the type that attempts to upload the photo to my phone. B) doesn't need some extra thing on the camera. In short I want the ml3 remote thing on the phone as the one I have doesn't work and I was forever losing it.