予習復習効率UP is an Android app developed by Benesse Corporation that aims to help Shinkenzemi high school course members prepare and review their classes efficiently. It supports English, mathematics, and Japanese (old and Chinese) textbooks and some supplementary mathematics teaching materials. The app offers various features such as a textbook page search function, a list of words and idioms, ancient and Chinese texts full-text Japanese translation, and subject/part-of-speech analysis. It also includes a feature to search for similar mathematics problems and a list of theorems and formulas for each unit. The app requires internet communication for use, and it is recommended to use it in a place with a good communication environment. Some models may not work correctly. The app is free, and it is available on the Shinkenzemi High School Course Support Site. Please install the app with the consent of a parent or guardian and check the Benesse Application Privacy Policy before use.