I'm creating an Android app that will be used for a specific construction test. At the end of the test the app will create a report and a small charge will be made to produce that report.
Now, this is easy, on an individual basis, to implement using in App payments where the user would pre-purchase a number of credits and use them up as he goes along.
Suppose a company approaches me and asks for "An account" that many instances of the app (from his different offices ) simultaneously uses up the credits from one central account?
Suggestions on how this could be implemented and, more importantly, managed would be gratefully received.