On Sun, 18 Apr 2010, Dave Camp wrote: } Something worth investigating would be a free app that requires an } in-app purchase to activate the useful functionality. I seem to remember } that one of the available purchasing models was device specific as } opposed to account wide. That sounds more like what you are looking for.
This is what Vagaro Pro for iPhone does and it is quite successful. It also lets the user create an X-day trial via the website, so one can get a good feel for the app before purchasing the service. There are several apps that do this via subscription and if they are for the professional market, they do very well. You may want to also watch the iPhone OS 4 keynote where Jobs talks about the new enterprise features, as they may be what you're looking for, distribution wise. /vjl/
