This app is indispensable. It provides a way to look up words and hear the correct pronounce as well as providing definitions. I keep it by my side at all times while reading. The other day while reading, I came across the word "prosopagnosia," and while it might of been possible to figure it out from its context the app made it a snap.
JoelieJoelie about Howjsay Pronunciation, v8.3