Virtually all free online fingerprint lie detectors are categorized as entertainment prank apps

: Brain Fingerprinting as a Lie Detection Technique? This paper examines how the brain responds to specific information that only a guilty person would know.

Based on the fingerprint analysis, the participant's deception score indicates a low-to-moderate level of deception. The test results suggest that the participant may be hiding some information or not telling the whole truth, particularly in response to the relevant questions.