王羲之蘭亭序 is a free Android application developed by Zhang Dongdong in the Utilities & Tools category. This app allows users to explore and appreciate the famous Chinese calligraphy masterpiece, Lanting Xu, created by Wang Xizhi, known as the "sage of calligraphy."

The main features of the app include the ability to browse through different versions of the Lanting Xu, view individual characters, practice copying the calligraphy, and access a collection of Chinese characters. In addition, the app offers useful auxiliary functions such as bookmarks, a favorites folder, and a browsing history.

For calligraphy enthusiasts,王羲之蘭亭序 provides a convenient and accessible way to study and appreciate the beauty of Wang Xizhi's renowned work.