Personally, I don't think I would use this much.
As I understand it, its simply a digital version of a print record. It would take me longer to peck in the required information on my phones tiny keyboard, than it would just to pick up a pen and write it on the clipboard and tablet I keep in my darkroom. Furthermore, if this is in fact what it actually is, what happens when all of your print information is stored on your phone, and your phone crashes? I'd prefer to have a hand written print record to keep with either the proof sheet, or the test print.