Use APKPure App
Get Timed Horror Sounds old version APK for Android
Choose one of the scary sounds, set the time and scare your friends.
There are 9 different sound effects in the application, you may choose and listen to one of them. You may manage the application to run after a specific time, by choosing one of them, setting a timer between 5 and 60 seconds tapping "Hide" button. By this way you may make afraid and surprise someone. Have fun...