I'd like to know how you would call the part of the application which is not the showcase, not the app itself, but the part between both.
Let me explain with more details. It is something very common to have a showcase presenting what your app does, then having the app itself. However, you HAVE to log-in/register to access the app. Let say the login screens (login, signup, password recovery, etc.) do have a different layout. How would you call this set of screens?
Examples: logged-off part, user-account management part, etc.