I must understand how to integrate the wordpress user database within the application so that you can sign in and join the application while using wordpress database so that you can also sign in on the website and application with similar ID.

Quite simply

  1. User buys application. ---YES
  2. When the user isn't a member(on application or site), is needed to join up within the application itself (Or Site, But is required to register to make use of the application)
  3. When the user is really a member(on the website or application), is needed to sign-in (With similar USER ID+Password as in the site a treadmill from sign on application - have to be drenched directly into make use of this application)
  4. The application records/keeps the consumer particulars around the device for login reasons, last-update needs, etc?--- YES