成語典 is an educational reference app available on the iPhone platform. Developed by 虎 李, this free app is designed to help users explore and understand Chinese idioms. With over 20,000 idioms included, the app provides detailed explanations, origins, historical stories, usage examples, and identification of each idiom. Additionally, the app features a powerful search function that supports searching by Chinese characters, wildcard characters like "%", and Pinyin initials. Users can also browse the app offline, without needing an internet connection.

One of the standout features of 成語典 is its daily recommendation function, where the app suggests 20 commonly used idioms to users every day. Users also have the option to save their favorite idioms using the app's bookmark feature. Whether you're a student looking to expand your knowledge of Chinese idioms or a language enthusiast interested in the cultural aspects of these expressions, 成語典 provides a comprehensive and convenient resource for exploring and learning about Chinese idioms.