Great potential
This is an effect for the advanced worker. If you are conversant with magic techniques, you will immediately realise the full potential of the program. It is, clearly, an effect in which the IPhone clearly does NOT do all the work for you; so you will be credited with being a magician, and not as a guy who happened to stumble upon a clever app (which is often what transpire with a lot of magic apps.) It can notably be used in conjunction with Williamsons strike vanish and with the Mercury Fold. And it could be a killer combo with Osterlinds 3 card routine.
Really, really cool.
Arty00; about
Card2Phone, v1.6