Arcade lets you stylize photos with other artworks and paintings. It lets you combine content of one image with style of another image. Arcade is an experimental app and may work very slowly or may not work at all.
Arcade is based on the Torch-7 implementation (https://github.com/jcjohnson/neural-style) of Neural style algorithm. This is the Android port of the same and the source is available here - https://github.com/naman14/Arcade