The new website introduced by Microsoft How-Old.net, guess how old you are. The site is way for Microsoft to show off what it's working on behind the scenes, with smarter applications that can use facial recognition and huge amounts of data to make intelligent guesses. Supposedly, the app learns over time from the data everyone uploads, improving and becoming more accurate as more people use it. You can read more from the technical site blog Here

The demo website, isn't highly accurate, but it's give close result to what you are expecting, but its getting better and better, it thinks I'm 29 years old, which is correct at the time i took the picture.

check the source page for more info.

Source by: http://www.iconis.info/2015/04/the-new-microsoft-website-that-guesses.html