Be cautious before talking. Because the smart smartphone will tell you are not really telling lies.
Many Lie Detector apps are found in search of the Play Store on the mobile. They are all just fun to do. But if any such app comes up? That day is not too far away. A group of scientists at the University of Copenhagen are now ready to create such an app. After downloading on the app phone you can know that you are not telling the truth or lying.