My app keeps freezing when I try to open it?

I have an app called fifa 16 companion app and everyone I try to open the app it just stays at one screen for about 5-7 seconds then my phone goes back to the home screen ( my phone is an iPhone 5c ) I have already tryed deleting it and reinstalling it, refreshing it and I don't know what to do now, can anyone help?

Restart phone