Gridditor by Tai Shimizu
Grids are fundamental to mapping out most designs, whether it's for the web or app development. Grids have also been used to structure pictorial compositions. Gridditor capitalizes on this fundamental design principal and makes it intuitive and fun. Four cardinal points are designated by assigned filters. As you move the grid left to right, and top the bottom, your photograph takes on the properties of the filters assigned to each area. Each area of the grid becomes a gradation or synthesis of the adjacent filters. It's best to see this app in action. Check out my review below. The app is $1.99 in the App Store.