Lie Detector Test - Truth Scan is a free lifestyle application available for iPhone users. The app, developed by Akash Ram, allows users to prank their friends by simulating a fake fingerprint detection lie detector test.

With this app, users can prank their friends by asking them to tap and hold their finger on the fake fingerprint scanner while thinking of something. The app then provides a fake result of Truth, Maybe, or Lie, making it seem like it's based on the fingerprint scan.

Please note that this app is purely for entertainment purposes and does not actually detect if a person is lying. The developer also includes a disclaimer stating that the app is a prank and does not determine truth or falsehood based on fingerprints.