iOS Question Help!! Store version behaving differently to debug version

[Arf]

Hi,
I've just got my app out on the App store, uninstalled my debug version and bought the app. It crashes out when I try add something to the database. This doesn't happen with the debug or release version when I was developing.

Don't know where to start debugging this now, any suggestions? I don't have a mac, only iphone SE.

 

[Arf]

Thank you very much Erel, much appeciated!