Inkstone

Inkstone is a mobile app for people who want to learn to read and write Mandarin Chinese, with:

• An array of free vocabulary word lists, and the option to upload your own
• An automatic grading system - simply use your finger to write the character!
• Customizable spaced-repetition scheduling so you can focus on the most important words
• Over 9000 character stroke data files, including both simplified and traditional forms

See more information about the app, including its source code, here.

Download the app, choose words to study, and start learning!