Guess My Age is the an additive age-guessing site on the Internet! (We’re not sure what the competition was like or how accurate this claim may be, but we’ll go with it.)

The premise is really simple: you are shown a photo of a person and you have to fill in a text box what is the age you think this person has. Of course you can also put your picture out there in the Web and have other people tell you what they think your age is.

It’s surprisingly addictive: A person’s photo pops up, you guess her age and hit enter, then you see how far off you were, plus the average age others guessed. And at the same time, another person’s photo pops up. You try to quit, but there’s just one more person and you just have to know how old they are. Trust us. That’s how it works.