A free program for Android, by App Basic.

The best way to make a friend think you’re a creepy, scary ghost is to send them a picture of you in a ghost costume. If they’re smart enough to look closely at the picture, they’ll realize you’re not a real ghost. But if they don’t, you can scare them into thinking you’re a real ghost, which is more creepy and scary than you. That’s what this app is all about. With it, you can easily make a creepy photo and scare your friends.

The first step is to download the app. Open it, and you’ll see a bunch of scary costumes, scary hats, and other creepy things. It’s time to pick the one you like the most. Now, you need to take a photo of yourself.