The App Ghost Detector is a game for you to enjoy with your friends.
Have fun scaring and ensuring good laugh with the different reactions of all, but be very careful to scare people, make sure they can be frightened. many people can get hurt and / or even the shock can cause attacks.
Also, be careful with your device, to be frightened people can tip it and damage the unit.
Taking all the necessary precautions you can have so much fun scaring everyone.