To manage the mobile app sections on the main menu you can access to:

System --> System configuration

Once there, go to WEB - APP section on the left menu, and then press on the tab MOBILE APP:

Here you can manage the sections that are visible on the mobile app such as the schedule, booking, championship...

You can also add personlized sections if you want and make them visible. 

For more information about this personalized sections you can go to: Add personalized sections to the mobile app

On the other hand we can also set limits on the access to the mobile app for different users. 

To see how click on the next link: State which users can access to the mobile app