Doesn't work for me – Fake-A-Call Free ™ Review

I have a iPod 5 and it doesn't work for me. It goes to a gray screen every time! And I can't exit out of that gray screen so I don't recommend this app for you. That's my opinion. Also there is plenty of prank apps out there , so if you know why there is a gray screen please tell me thanks iPod gaming?
Review by Taylor swift? on Fake-A-Call Free ™.