This is Halftoner - inspired by the work of a Finnish programmer who goes by "MetalFusion", I wrote my own app to do the same thing, and hopefully be a little more user friendly.
It can be downloaded from this link: https://drive.google.com/file/d/1yjGAhzCnm7jTHJ8gOoLr7U0sKcre4DFd/view?usp=sharing