Disclaimer Hello friends and family members! do not think if this Fingerprint Lie Detector Prank is a relay lie teller machine. this prank app is only for entertainment purpose to play with your friends.make your friends fools with it. result simply Turn On the green or Red signal depend on the calculation of your finger prints. With Finger Lie Detector you can now Detect whether your are honest or Lie. Lie Detector prank scans your finger print and returns the result in TRUE (honest) or false (Lie). Tap your finger on the Lie teller machine and holds for the calculation. after the scanning process is complete it turns on the appropriate LED i-e. True ( Green Led) or Lie (Red Led). Lie Detector Prank is just a prank app which will not tell you whether a person is telling truth or lies. It is just to make fun of your friends, kids or others by getting them to think you can detect if they are lying to you. Try out this free and unique lie detector prank for checking if some one is cheating and making you fool by just scanning his fingerprints on the lie detector machine.