What iphone app can make my picture black and white but leave my lips red?

Hi! I took a black and white picture and i want to leave my lips red. Is there an app on the iphone where i can make the picture black and white but leave my lips with color?

There would have to be a better one, but I know that 'Candy Camera' can be used for it. One of the filters works for me, so just scroll until you find it.

If your picture is already black and white it might be hard to make your lips red. But if your picture is still in color, color effects and adobe photoshop express seem to work fine

Look for anything saying it has "selective color".