Callers using internet phone system Skype who might be tempted to tell a few porkies should beware - the user on the other end may have a lie detector.
Skype says it is used by 136 million people worldwide
Skype is to offer the KishKish Lie Detector, which is made by BATM, as an add-on for customers.
It analyses audio streams over a Skype call in real time and illustrates the stress levels of the other person.
Skype's software lets computer users talk to each other for free and make cheap calls to mobiles and landlines.
Paul Amery, director of Skype developer programme said: "This is a really excellent application, and the kind of thing we want to see more of.
"Lie Detector is the latest in a variety of product in our premium add-on programme which greatly enhance the Skype communication experience."
No price has yet been set on the application, or a roll-out date.
The lie detector is the latest products which Kishkish has designed for Skype users, with others including voice mail and call recorder.
BATM says it hopes to be able to provide Skype users with further additions in the near future.
As well as operating in real time the KishKish device can also record calls for analysis later.
Internet auction firm eBay bought Skype - which says it has 136 million users - in September 2005 for $2.6bn.