Ultralingua offers two lines of dictionaries that use the same advanced dictionary and conjugation engines. All Ultralingua-powered dictionaries offer the same feature-rich, easy-to-use interface, tailored to your favorite platform.

Ultralingua titles offer thorough references with indications of context and usage; Collins titles offer premium content with even more richly edited entries.

Each contains up to 250,000 entries per language, along with idiomatic expressions, technical terms, and slang. Users can use the Verb Book function to

Version 1.2 includes Verb Book and iPhone 3.0 compatibility

view any form of a word (in most languages) when searching — from subjunctive to feminine plural. 

http://www.ultralingua.com/en/iphone-dictionary.htm

Available language sets include English, French, French-English, Spanish-English, German-English, Italian-English, Portuguese-English, Latin-English, French-Spanish, French-Italian, French-German, Spanish-German, Spanish-Portuguese, English-Esperanto, and English-Klingon.