Ready for 700+ brain-teasing puzzles? This free logical game will transform your smartphone into a digital Ruby Square. It is extremely easy to understand: you have to rotate blocks of squares to match a certain pattern. The difficult part is doing that in as few moves as possible, below the world average. Ruby Square sharpens your brain and helps you improve your memory and concentration. It is ideal for players of all ages, as a fun way to practice your puzzle solving skills. Main features