Leap and FEB have a strong portal background. Apps were integrated in portal pages and could be accessed by the users through those.
Volt apps are accessible only through the use of URLs, sent to the users or embedded into other systems.
Create a page for users, they can see all apps, they have the rights to use. A little bit like the manager.html, but for the users.
This way, (new) employees even can discover apps they can use.