This app as limited use but it is really amusing when you see your husband or friends face like I did when he heard the loud crack and looked at my kindle screen. I just wish I could have carried the joke on a little longer before bursting into laughter.
Its actually quite bad because it doesn't work properly in my own personal experience. when I tried to use it, the cracked screen didn't show after 10 seconds, which was what i had set it for. Maybe I was stupid for even getting the app.