Now,an iPhone app that judges good looks

Developed by app designer Dapper Gentlemen,the app provides an on-screen grid to help the user line up the picture for best results. Based on the camera feed,it automatically scans the facial features in the picture to determine the ugly rating after you snap the picture. The app will offer final conclusions of who is the ugliest that nobody can argue with.

When tested on the faces of some of the worlds most glamorous celebrities the results were a little controversial,to say the least.

In a head-to-head battle between fellow X-Factor judges Cheryl Cole and Dannii Minogue it was the former Girls Aloud star who came out on top. Cole scored a respectable 4.2 which prompted the acerbic put down: Wow youre ugly,is your doctor a vet?

But Danniis face fared even worse,scoring a terrible 9.8 out of ten and was told: Youre so ugly,you could make a glass eye cry.

While it is obviously just a light-hearted bit of fun,there are some who may take issue with the Ugly Metres judgement of curvaceous TV star Christina Hendricks.

Despite being the object of admirationg of millions of men across the world,the Mad Men actress pale-faced beauty did not impress the gadgets scanner and she scored the highest ugliness score of 10 out of 10.

However the Ugly Metre was rather more complimentary about actress Angelina Jolie,who scored an almost-perfect two out of ten which earned her the admiring phrase: Youre so hot you make the sun jealous.

But there was bad news for her husband Brad Pitt,who was beaten by David Cameron. The British Prime Minister might not be everyones idea of a chisel-jawed hunk but he still managed to outpoint Brad by a single point.

The app costs 99 pence to download from Apples App Store and requires 5.5MB of free space to work.