I want to distribute a free version of my app which will allow the user to do everything except save the data they've entered. The paid version of the app would add only that data-saving function. The free app would be quite useless without the ability to save, though it would demonstrate the app layout and functions, and show how to use it.
So, should I make two different versions of my app available on the App Store? Or should I have just one version and use In-App Purchase to unlock the save functions? If the latter, could someone point me at a tutorial that would show me how to do that?
dkj