Idiom Dictionary Simplified Version is an educational iPhone application aimed at enriching your knowledge of Chinese idioms. With over 22,000 entries, including 5,000 main entries and additional appendix entries, this app provides detailed information such as meanings, origins, pinyin, reference words, synonyms, and antonyms for each idiom. The main entries also offer rich content from various classical sources and explanations.

Users can easily search for idioms by Chinese characters, wildcard symbol '?', or pinyin initials without needing an internet connection. The app also offers an upgrade to the professional version, which includes additional content like historical evidence, identification tips, and usage examples.