FREE - In Google Play
FREE - in Win Phone Store
A related question: Can studying chess be a waste of time? If so, when? And for whom?
My personal answer is yes, it's a waste of my time to study. Because I play for fun and sociability, and I do Not like studying. .... any more.... I declared out loud on the day I got my doctoral degree that Nobody could Ever make me study again! ... not even Me. (and I've stuck to my resolve. .... teehee)