The overview of the app is divided into four sections:

My InvitationsAssignments for which your employer asks you
My AssignmentsAssignments in which you are actively involved
To complete Assignments for which, for example, working times should be entered afterwards
HistoryInsight into the work you have done

In the footer of the start overview there are four further categories, these can only be viewed from the start screen. 

HomescreenThis button takes you back to the overview
MessagesHere you will find all messages from planners that are directly addressed to you
NotificationsHere you will find all standard messages sent by the system
Userdata Here you can find your data. You can manage and change them yourself if necessary