This picture was taken with my Samsung NV10 on macro settings, but was placed in my iPhone library as I sync some of the iPhoto folders. The original is here below:

Using the iPhone app, Colorsplash, I was able to bleed out the color from the background leaving only the subject in natural color. Doing this took about 2 minutes of zooming and swiping away the color, basically the same amount of time as on a laptop with Photoshop. The reason why its better on iPhone is because the touch interface is made for this kind of photo processing. It joins a trayful of iPhone camera/photo apps which I find indispensible. Available currently for a 1.99 on App Store.