"Finger Lie Detector Prank" by Just4Fun is a free lifestyle app that allows you to play a joke on your friends by pretending to detect lies based on finger pulse, pressure and sweat production. This entertainment application displays "TRUE" or "FALSE" on your phone screen when your friend puts their finger on the scanning pad, answers the question and moves their finger away. However, it is important to note that this program is not a real polygraph and you need to know the answer to the question to make a good prank.

To use the app, you need to cheat your friend that your mobile can detect a lie based on finger pulse, pressure, and sweat production. Then, ask a question you already know the answer to. When your friend tells the truth, tell them to move their finger away when the red scanning light is in the top half of the green scanning area. When your friend lies, tell them to move their finger away when the red scanning light is in the bottom half of the green scanning area.

In addition to being a prank app, "Finger Lie Detector Prank" can also be used as a live wallpaper or widget. If you encounter any issues with this app, the developer, Just4Fun, is available to help resolve them as quickly as possible.