Instagram is a social networking photo sharing service available for the iPhone, Android, and Windows Phone platforms as well as for the computer. Users can take photos and short videos, up to 15 seconds long, and share them with other Instagram followers and on other social networks like Facebook, Flickr, and Twitter. Similar to other social network services, Instagram is a free service where users may follow one another and like each other's pictures or videos.
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Instagram was created by Kevin Systrom and Mike Krieger and was first launched in October 2010. Instagram had over 30 million registered user accounts by April 2012 and users had uploaded over 100 million photos by July 2011. In April 2012, Systrom sold Instagram to Facebook for 1 billion dollars in cash and stock.