While there are a ton of apps that help you achieve special effects for photos captured with your iPhone 4 or 4S, the Special Effects Kit for iPhone 4 and 4S from Dot Line is a physical phone case and filter wheel that lets you do just that.
You'll have your choice of seven different effects including motion blur, close up, soft focus and more. To get started, simply set your phone into the case and rotate the filter wheel to your selected effect. To switch between them, just rotate again. There's even a setting on the wheel without an effect, so you won't need to remove the case when you want to take the occasional raw image. Also included in the kit is a protective cap for the filter wheel to keep it clean and dust-free.
