Although Instagram has only been around for a little over three months, you’ve most likely heard of it, if not used it. For those of you in the former category, I’ve got an overview for you of what it is and why I think it’s so wildly popular. Instagram is a photo-sharing app for iPhone. Sorry Blackberry & Android users, it’s not available for you yet. One of the reasons Instagram is based on the iPhone is because of its amazing camera. So people are already taking lots of great pictures with their phones, why not try to make them more interesting?