lie detector test | Wex | US Law | LII / Legal Information Institute

These apps use "simulated" scanners to fool friends. They are widely available on the Google Play Store and Apple App Store .

: This version adds a "shock" element to the prank. When the "lie" result is triggered, the phone vibrates intensely or plays a loud sound to startle the "liar". How They Work: The Science vs. The Prank