Color Splash Effects lets you quickly and easily give photos a dramatic look by converting them to black and white, while keeping your chosen details in color. This effect draws the viewers attention to the colored areas.
Use your finger as a brush to "paint" sections of your image black and white, or to bring back the original color. Zooming in and out using the two-finger pinching gesture allows you to work on details with pixel-accuracy.
Its super quick and super easy.