OK, so I really play NO games online, no app games but my girlfriend tipped me off to this one and now I'm hooked...

It's called 2048.  You have to match numbers on a board 2 and 2 then it becomes 4, you match the 4's to make 8..etc, until you get to 2048.  This thing might as well be a rubix cube.  I suck at it and it does not seem to affect me at all because I just play again.  I do know it is available for download on itunes and android.  It's rocking my socks!  It's nuts to buts, it's the ham jam.  I'm in there like swimwear!  DO IT!!