I came across the site for SpellTower, an app for the iPhone and iPad. As soon as I saw this quirky illustration of the tools you’ll need to play, I was in! This app is a lot of fun. It’s well designed and quite addictive. I’m a terrible speller and my best words are paltry 3 or 4 letter low hanging fruit, but with integration with the iPhone dictionary you’ll be learning new words in no time.
They have a special on at the moment, so for NZD $1.29 you can’t go wrong.