Microsoft introduced How-Old.net, a website to guess how old you are, your gender etc at Microsoft Build 2015 developer conference.
The site uses very smarter techniques and machine learning algorithm to do facial recognition and huge amounts of data to make intelligent guesses. Also, this application will keep on learning over time from the data everyone uploads, improving and becoming more accurate as more people use it.
How-Old.net isn’t highly accurate as they have mentioned on the website as well, but they are trying to make it better. Using How-Old is very easy we just need to upload our own photos, or choose from a Bing Image Search.