Down in my part of Texas we wear the holster and carry the iPhone in a pocket. Seriously though, I got my iPhone used, like my film cameras, and got the light meter app just to see how cheap a "game" it was. But after checking it, I was surprised it does seem to work well enough for good lighting situations with snapshot film. To those doing business with their smart phone I will be getting the credit card terminal next.
Thanks for letting me comment.