"Lie Detector by the Expression" is a unique and intriguing app for iPhone that utilizes real psychology studies to track facial expressions and determine if someone is lying. Developed by Jorge Gregorio Martin Bello, this free app offers an interesting way to analyze the eyes movement, lips, and face shape of individuals to compare with nine different expressions commonly associated with lying.

To use the app, simply record the face of the person you want to track, ask them a question, and press the record button. Once the answer is complete, press stop and instantly receive the result: Lie or True. However, it's important to note that the accuracy of the result depends on the user's ability to maintain a neutral face while answering.

The app analyzes various facial expressions, including eyes darting, rapid blinking, closing eyes for more than one second, looking up to the right, looking directly to the right, looking down to the right, false smile, pursed lips, and head shaking. While the results are not entirely reliable, they are based on real psychology studies.

Download "Lie Detector by the Expression" now and put your lying skills to the test!