Who doesn't like a good scare? That's the premise behind Horror Phone, a practical joke-generating app that can be used in a number of different situations, depending on just how much you want to terrify your friends or family. The app is very simple, using motion detection and a selection of scary and spooky sounds to alarm whomever touches the phone, but it works quite well and could theoretically be a strong component in your next Halloween scare playbook.
The concept is simple. Choose a sound -- either a scream, a wolf howling, or a very eerie "I can see you" message. Then choose how sensitive to make the motion sensor (or change it to a straight timer) and press start. The next time someone picks up the phone (the screen blackens so they don't know it will happen), the sound goes off and scares them. There are no additional options, and you should check your volume (the scream is especially loud), but the effect is exactly as advertised.
If you are eager to scare a member of your family or a close friend with your phone (or theirs), Horror Phone is a great way to do so. The app is fairly simple and has limited options, but when used properly, it can be as terrifying as any multistage practical joke, no matter what time of the year it is.