This fun and useful app allows you change iphone pictures and already saved album picture to black and white. Pocket Black and White allows you to change parts of an image to create some funky looking modern pics, or convert the full image to give it an older feel.
Once you have selected an image, simply use your finger to draw rectangles around the area you want to convert, and then press the convert icon in the top menu! Its that simple!
Check it out and let the converting fun begin!