"Play the FREE version of Blocker, the IQ challenge that you can play against your friends on the go! Blocker is a totally new, fast sparkling board game – just as challenging as Chess, just as fun as Words with Friends or Word Feud and just as great for those unwind moments as Sudoku!
Play against friends all over the whole world
Train your skills against the computer offline on difficulty level Easy
Simple and yet challenging gameplay
Turn-based design lets you play as many games as you want simultaneously
Connect to Facebook to find even more friends to play
Stay in touch with friends and family with in-game chat messaging
Push notifications tell you when it’s your turn
Access your games across your iPhone, iPad and/or iPod Touch"
Source: The Developer Website.