YASS offers two independent features: * Search for solutions of Sokoban puzzles. * Search for improvements of existing solutions. Solving and optimizing Sokoban puzzles are complicated tasks for a computer program, so the program can only handle small puzzles. YASS for Android can integrate with any Sokoban clone that supports solver plug-ins, like Soko++ or BoxMan. YASS for Android is based on YASS for Windows and other operating systems made by Brian Damgaard. See the official download page: https://sourceforge.net/projects/sokobanyasc/