Big Lens app

I saw this on iPhoneography, and was sold on the idea. This app lets you create focus effects, filter effects and even change the bokeh shapes. The 5 main reasons to install this app:

1. Smart Focus System: The Big Lens Smart Focus system allows you to use your finger tips to focus your images without any previous knowledge in Depth-of-Field. You can use basic geometric shapes or a lasso tool to auto-focus your target, or you can choose advanced mode to manually define your focus area. Smart Focus will then automatically refine your selection with precision.
2. Aperture Control: Adjust the aperture in Big Lens with a single gesture to instantly change the blur level of the out-of-focus area. Remember that larger apertures blur the background more! Big Lens also offers 9 unique lenses that allow out-of-focus light points to blur into shapes like hearts and stars. This great tool turns simple-looking backgrounds into atmospheric backdrops.
3. Filter Effects: Filters allow photographers to create special tones over images. Big Lens has more than 18 filters that allow users to enhance color, increase contrast, or add Lomo effects. The result is spectacular filter simulation results right from your iPhone. 
4. Instant Focus/Blur Tool: With instant focus and blur tools, users are able to instantly modify the focus and blur area with their fingers in no time. Use simple gestures to enhance and retouch focal areas to make the subject of your photos really pop! 
5. Before & After Preview: This is another great tool that allows users to compare before & after images to ensure they get the exact result they’re looking for. You can review your images at any time during your make-over process.

Get it on iTunes.