This app will make any door sound old and creaky just in time for Halloween

You don't need an elaborate engineering degree to rig together a haunted house. For Halloween, spray lubricant company WD-40 has released the Haunted Door app that instantly turns any door into a spooky, creaky one. 

The app's available for iOS and Android and is pretty straightforward. All you need is an iPhone or Android phone and a small bag or pouch to hang it to a door knob. Then choose from three haunted door sounds and the next time someone tries to open it, it'll sound like something out of a horror flick.