Hiding (not showing) the icon of applications completely.
Since I have a few users and some of them have the one and only purpose and I only need two applications (Files and Phonetrack) and the rest is only annoying especially on small (smartphone) screens.
This should be done in Personal settings (so it is not an insecure way of robbing one of an application).
Select another display of menu (eg: big menu), hide apps in the menu and in the top menu.
You also can hide the icon when there is no apps (an option exists).