Copybook is an iPhone app developed by Ubik Technology LLC. It is a free educational and reference program in the category of Education & Reference.

Copybook is designed to help users learn Chinese writing. Whether you want to teach yourself or your kids, this app provides an effective learning tool. With more writing spaces than a traditional copybook, you can practice writing Chinese characters and learn through imitation.

In addition to learning Chinese writing, Copybook also teaches the zhuyin and pinyin pronunciation, which are fundamental for learning to speak Mandarin. The app also provides English and French translations of Chinese character definitions, allowing users to learn multiple languages simultaneously.

Some of the useful features of Copybook include writing animation to illustrate correct stroke order, pronunciation guides, number of strokes, radicals, examples of using Chinese characters, and a replay function to check homework. The app also offers a 5-star scoring system, the ability to email completed copybook pages to teachers or parents, and the option to share your writing on social networks.

For those who want to learn more Chinese characters, in-app purchases are available. The paid version offers three times more blank spaces for practice writing, multiple select function for sharing and printing, and the ability to print written characters and blank copybooks.

Overall, Copybook is a comprehensive and user-friendly app for learning Chinese writing and language skills.