What should I do if an app keeps crashing in iPhone 4?

[TwistedFairyLights]

I open it, it starts loading, then closes. WTF?

And what do I do to stop it? Have tried turning the phone off and back on. Same with the wireless.

Some apps are just rubbish.... Is there an update for it?

When you say you've turned the phone off you've done the whole "slide to power off" thing?

You can also try quitting the app itself. Double press the home button and the row of running apps should pop up at the bottom, flick left and right until you find the one causing the trouble, hold your finger on the icon until the little cross appears and then click it to quit. Then tap away on the screen and you should be back to your normal phone. Try the app again.

If that still doesn't work, I'd try deleting the app and redownloading it - you won't be charged again, and it sometimes helps.