From Schvarts Apps:
Want to meet spirits? And talk to them? Scare your friends! Spirit Detector uses the embedded sensors of iPhone to detect spirits. It tracks the location of spirits and display them on the screen, with a camera on the background. This app also plays the sounds the spirits make! Press Detect, and the detection mechanism will be activated. Experience how spirits almost glue to the screen, they don't let you go away. If you shake the device, you'll scare spirits away though. Send flux, and the iPhone will vibrate and emanate a flux that will attract spirits. You can take a picture and save it. With the spirits, of course. Have fun, and maybe meet spirits of a past life.