Mandarin Chinese Dictionary is a free iPhone application designed for students, teachers, tourists, and language learners. This bilingual dictionary offers translations between English and Mandarin Chinese, with over 350K words and phrases available offline. Users can translate individual words, phrases, or entire sentences, and benefit from features like thesaurus, synonyms, and antonyms. The app also includes games to enhance vocabulary, offline pronunciation for proper word learning, and tools like bookmarks, recent history, and word of the day for continuous improvement.

With functionalities like scanning text in images for quick searches, cross-searching by tapping on words, and various language learning tools such as flashcards, phrase books, and quotes of the day, Mandarin Chinese Dictionary is a comprehensive language companion for those looking to master English and Mandarin Chinese.