You can use this app to prank someone, like if you've ever needed to know if your friend or your mother is telling the truth or not.

So if you want to have fun with your family or friends, then try this application.

After all, it's really fun!

You can test their statements by pressing the volume buttons; volume+ for truth, volume- for lie and then a fake fingerprint scan will appear.

Enjoy this fun fingerprint scanner.

It's free, so you don't have to worry about paying a penny.