This Pro version of The Free Dictionary is everything you could possibly want in a mobile dictionary. It has comprehensive definitions of words, pulled from several different respected dictionary resources, such as Random House, McGraw-Hill, and more.
The dictionary also includes 14 foreign-language dictionaries and a thesaurus. Each word looked up provides recorded pronunciations of the words in both American English and British English.
The front page of the app welcomes you to a Word of the Day, a unique word game, “Today in History”, a famous historical figure's birthday with a brief biography, horoscope, and weather.
Your favorite vocabulary items can be saved in a separate screen for easy reference. The app's main display and font size can be customized to your liking.
The app also allows you to search specialty dictionaries in medicine, idiomatic usages, legal, finance, science and computing.
This is a very comprehensive application that really gives you a lot of bang for your buck. No hard-bound dictionary can offer all of these amenities and would cost at least 20x the download fee for this fantastic helper.
Compatible with iPhone, iPod touch, and iPad.