Click on Reports tab and it will show no report found.

Goto mobile manger reports  then click on the setting cog on the top right. 

Then select Configure Subscriptions

Then select the reports you want to be shown

You also can tick Notify if you want to be notified of a new version of this report.

Once you are subscribed to a report you will see then in the reports tab.

In Setting on the mobile app under Reports you can define how many reports are shown and download options