KUMON PUBLISHING CO.LTD. has released a new app called 中学基礎100, which is a revision app for Japanese middle school students. The app allows students to brush up on their knowledge from the "Chugaku Kiso ga Tame 100%" series 4-choice questions. The app covers important points from five subjects that are essential for regular tests. Once downloaded, users can access the contents of the purchased book free of charge. However, users will need to input a password for the first time they use each content. The password is available in each book.

The app is compatible with Android devices, and the developer has tested it on Galaxy S7edge (OS 8.0), Xperia XZ1 (OS 9), and Pixel 3aXL (OS 10). It is important to note that the app may not work correctly on devices and OS other than those mentioned above.