I had a Droid X before getting my iP4 and there was a sweet app on there called Camera360. It had lots of filters and things, but the best feature was something called ColorShift. Basically, as you're taking a picture you would select a color that you want either eliminated or "held". So for example, i could line up a picture of my kitten and tap on her pink nose, and i could either make the pink of her nose the only color with the rest B/W, or vice versa, with her nose B/W and the rest in color. It was much better than that app in the App Store where you have to use a selector tool to select the area you want to hide (the one with the green apple) because it took little to no effort and it kept the shading and didnt have jagged edges. it just seemed really professional.
Does anyone know of any apps that do this? I read about an app called ColorChange but it's $2.99 and it's got inconsistent reviews, and I dont wanna waste the money on an app that doesnt work.