AirPocket App Stats/Updates, page-103

It shouldn't matter; the code in the background generating the actual transaction is the same no matter whether you use an iphone/android or computer.

All they need to do differently between each system is the user interface so there is really no reason not to do it (that I can see)

Have experience developing code with apps and websites; the hard part is done already. UI stuff is generally the easiest part. they will be maintaining all the systems and code from a computer anyway so it's not any extra maintainace work really.