The gadget tells you whether your partner is going to run a mile away from you due to the bad breath.
Users need to just breathe into the device and the gadget analyses just how bad the smell is, giving it a rating on a scale of one to four, the 'Daily Mail' reported.
The report suggests users to try the tester before a dinner date and they will get to know if it's wise enough to lean in for a good-night kiss.
Traditionalists often prefer breathing into their hands or get on a bus or train and gauge whether there's a stampede of commuters getting off a stop too early.
