Doesnt work for me

I have a iPod 5 and it doesnt work for me. It goes to a gray screen every time! And I cant exit out of that gray screen so I dont recommend this app for you. Thats 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

Taylor swift about Fake-A-Call Free ™, v5.08