ILabyrinth

Scary App: The iPhone Prank
Scary App: The iPhone Prank is an iOS application made by Cyoshi Games. After the splash screen, the app pretends to be a fake game called iLabyrinth and tells the player to beat all three levels. However, at the end of the third level, a picture of a zombie woman appears along with a scream. The app then takes a photo of the player's reaction.

Links
NOTE : The following app contains a screamer.
 * itunes.apple.com/app/scary-app-iphone-prank-ilabyrinth/id329272721
 * youtube.com/watch?v=aIvNDBy8jj0 (gameplay video)
 * scaryapp.com (official website)