Disclaimer: This application does not work as a real lie detector and should be used for entertainment purposes only.

Lie Detecor Plus is an application that detects changes in one's voice frequency and modulation and based on that data calculates the probability one is lying.

First you need to calibrate the device: speak to the microphone a true sentence in your normal, calm voice.
Once the green light is on, the app is calibrated and ready to work.
When the device detects a change in voice, that might suggest a lie, a yellow or a red light will appear.