Modern Drug Test

This team from Poland wants to drug test you using their Windows phones. Using their Modern Drug Test app, hold your phone to a person's eye and, based on scientific research on how drugs affect the eyes, the app will tell you if he person if under the influence of drugs. Modern Drug Test is a quick, cheap, and portable field test for drug use, if a little invasive. Can you imagine your friends testing your sobriety each time you enter their house?
The Modern Drug Test team won second place in the Windows Phone Challenge.