iColorama is a great effect app for your iPhone photography, check out the features below. This app usually retails for $2.99/£1.99 but at the moment it is free. Just click here to downnload
– Use 4 smart masks for enhancing details.
– Deform the image with your finger or use 8 deforms presets
– Enhance the colors and tones of your image, more than 100 presets combined.
– Create pieces of art applying Sketch, Simplify and Paint effects even if you are not an artist
– Upload the result to Facebook, Twitter and Tumblr directly.