The design examples for a city guide application describe different scenarios for designing a first-time purchase in your application, and a restoration of content that the user has purchased earlier. A scenario for providing help to the user is also provided.
In the design scenarios for this application, the purchasable content, city guides, is not protected with built-in DRM, and it is located on a back end server. The server also stores details of users' past transactions, which enables restoring previously purchased guides to the user.
For more information about the city guide application design examples, see: