Popping Square app for iPhone and iPad
Just tap the screen to spin the blocks, swipe horizontally to move them left - right or swipe down to force them fall. Surely the preview of the next block will help you to complete rows and rows.
It is very easy to play and will entertain during lots of minutes and even hours during your free time, trips, etc... and no need to be online.
The famous, nice and funny puzzle game now free for your phone.
That´s all, the rest depends on you and on your ability.