With Kozmik, you can arrange the visibility of the app screens according to your needs. Screens can be viewed by everyone or just logged-in users.
If the app has more than one user profile, you can define user-specific screens by using the User Profile Data. For example, let's say you have admin screens and you want only users that have admin role to access these screens. In this case, it will be sufficient to select the Visibility Setting only for Logged-in Users and add rules with User Profile Data, other users will not be able to access the relevant screen.