天干地支 is an educational application on iPhone that delves deep into ancient Chinese philosophy, calendrical systems, and the art of divination. It aims to provide users with a profound understanding of traditional Chinese culture. The app offers tools for calendar conversion between lunar and solar calendars, explanations of Heavenly Stems and Earthly Branches, and insights into the theory of the Five Elements.

Delve into the generative and overcoming relationships of the Five Elements, explore the Eight Trigrams and Sixty-Four Hexagrams, and learn their symbolic meanings and divination applications. 天干地支 provides an interactive and engaging experience for users to learn about these intricate aspects of Chinese heritage.