A free program for Android, by floweryo.

Coloring books are the best way to relax and enjoy your free time. With a wide selection of images from superheroes to all kinds of animals, there is always one that will suit your preference.  If you are looking for an app that allows you to color all your favorite Super Heroes in jigsaw puzzles and coloring book games, then this one is perfect for you.

You can paint all the superheroes you know and love, from Spider-Man, Captain America, Thor, and many more. All you need to do is to install the app, choose the puzzle you want to play, and start solving it.