千字图 万字图 - 4DM is a free Android app developed by BSTan that aims to make it easier for users to access various Chinese character charts, including the 千字图 (Qiān zì tú) and 万字图 (Wàn zì tú). The app was inspired by the developer's elderly mother, who had difficulty flipping through the pages of old character charts.

The app features a powerful search function that allows users to quickly and easily find the characters they need. The charts included in the app are 解梦万字图 (Jiě mèng wàn zì tú), 大伯公千字图 (Dà bó gōng qiān zì tú), and 观音千字图 (Guān yīn qiān zì tú). Overall, 千字图 万字图 - 4DM is a convenient tool for anyone looking to learn or use Chinese characters.