According to documentation when trial is expired and user opens the app, a message would be shown. But my app closes after showing splash screen without any message in this case.
There is the same question on the Microsoft's forum, but I can't write anything there (it returns me unexpected error when I try to submit my question) and there is no answer.
I get the following line in my event log:
App failed with error: No applicable app licenses found. See the Microsoft-Windows-Twin/Operational log for additional information.
Additional information:
< Data Name="ErrorCode" >-1058406399< /Data >
This is Microsoft's bug and they promise to fix it. You can get more details on the msdn-forum.