Thanks to all user for the great support. This app appears to be a game. Run the app, give it to someone you'd like to scare, and tell them it's an awesome game. While the "victim" is playing, a ghost suddenly and unexpectedly jump out, together with a loud and scary scream. Turn volume up and run the game before give it to your friends. this game that appears a Maths game ask a victim to play this Maths game. User can upload Prank video to Community and view other's prank video also. GUARANTEED: We have tested this app on 30 people and we've lots of fun! Some tried to kick us afterwards - but that was absolutely worth it! If you love this app, please support it by leaving a review in the app store. Thanks for your help I really appreciate it! Please don't forget to rate us on app store. it is very helpful to serve you better. PLEASE: Do not show this to people under 15 or people with faint of heart. Be careful, people may drop your device. Play in controlled environment only! -- Authors of this application do not take responsibility of any results using this application --