If you like shooting wide, landscape images, several of the film effects and the great vignette make this app worthy of consideration just to play around with for now and to get into the upgrade path, but keep in mind that the app currently has its flaws.
One of the features that makes the iPhone camera unique is the availability of thousands of photography-related apps. For less than the cost of a DVD, you can basically get a whole new camera experience.
Life In LoFi is one of the oldest and most-respected blogs about iPhoneography (iPhone photography) and capturing the world in digital lo-fi. Featuring iPhone photo news, showcases, app reviews, and the occasional musings of iPhoneographer Marty Yawnick.