iColorama is a hugely popular app for mobile photographers wanting to enhance their images. We have published several tutorials here at theappwhisperer by Jerry Jobe demonstrating some of its attributes. This latest update includes a new flow, Simplify, Edges and 200+ new textures.
This is a free update if you have previously downloaded this app, if not, you can do so here. It retails for $2.99/£1.99/download.