DeFIBulator is available for about a year now but worths a revisit. It measures vibrations in the voice to work out if the person speaking is being dishonest.

The maker of the product, Spion of Singapore says that “These vibrations are caused by the user going from a state of calm to being a little nervous as you would be when you lie. Even an FBI polygraph isn’t 100 per cent accurate but after extensive testing the DeFIBulator was shown to have a 65 per cent accuracy rate.”

A key feature is the character on the screen, “Demonochio”. The greater the tension in the voice, the longer his horns and nose become.

Spion says the device shouldn’t be used for serious purposes, but its success rate means it can spice up a game of truth or dare at a party.

To train the device to the subject’s voice you ask three yes/no questions and then record the voice to establish a baseline. Connecting it to your mobile phone improves levels of accuracy because of the digital connection.