CHNBoard is a versatile handwriting input method designed for iPhone users. It supports simplified Chinese, traditional Chinese, traditional Chinese Hong Kong, and traditional Chinese Taiwan. The program boasts a wide range of features, including accurate recognition of large vocabularies, support for Arabic numerals, symbols, and English letters, Pinyin Zhuyin mode, customizable keyboard height, stable input, handwriting history viewing, offline use, and system theme adaptation.

CHNBoard provides a detailed tutorial for quick practice and setup instructions, ensuring a smooth user experience. Users can customize keyboard height and access handwriting history easily. The program operates offline, eliminating the need for an internet connection, and seamlessly integrates with the system's dark and light color modes.