This app draws in users with a compelling brain challenge embedded in a sleek design. Not your parents’ Scrabble, SpellTower melds Word Scramble, Tetris, and Bananagrams. Spell words by tapping or sliding tiles backward, sideways, or diagonally, and they’ll fall away to score points and provide a new configuration. But better than many word games, this app requires strategic thinking.
Best For: Age 9 and up 
Brain Boost: High 
Fun Factor: **** 
Cost: $1.99
Download On: iPhone/iPod/iPad