I am developing an app that helps spanish speakers to learn English.
I would like the provide the app for free and then make use In-App purchase so that the users can view the full features of the App. Say for example In the free version the user will see the first form with some tutorials. If the user pays via In-App purchase then he or she will be able to access other forms that provide more tutorials and phrases. How can I implement that?
I tried using the sample code which comes with the In-App SDK and failed. Please help perhaps with a small sample code to get me started. Thanks in advance