Hipstamatic is one of my all-time favorite go-to photo apps on the iPhone. It is among the earliest photo apps to be developed for the iPhone, and I've had it since it became available. Despite the fact that there had been countless photo apps for the iPhone since, of which I've downloaded and tried many of them, I find myself going back to Hipstamatic over and over again. I love the fact that its developers continue to support and improve what Apple deems to be an "essential" app. It helps, of course, that I'm already very familiar with the way Hipstamatic works, therefore, I am very comfortable using it, but the main draw is the amazing results I never fail to get. I love the kind of analog-looking digital pictures I get out of Hipstamatic, and the people with whom I share my photos love them too.
[Note: To get Hipstamatic from the Apple app store, click here.]