Does anyone use a printer app on their smartphone for getting their kid's homework or any other homework related work done? Any app that is: a) Time and energy saver. b) Helps with Home Printing. c) Cartridges are economical. d) Can be downloaded on your smartphone to give you wireless printing and scanning? Incidently I use the HP Deskjet inkadvantage app on my smartphone. But are there any more similar printer apps available?