Im sure this is the best English dictionary for mobile devices. The word coverage is excellent, apart from the normal English words it also contains extremely rare words and expressions, dates, biograpy, geograpy, medicines, diseases, technical words and so on. It is almost an encyclopedia. The related words (more specific, more general words for each result) feature is sooo unique and useful. Ive never seen this feature in other dictionaries so far. And the user interface is simply beautiful, just have a look at the screen shots. Its highly recommended! 5 out of 5 stars.