The "学研ランク順　入試" app, developed by Gakken Co.Ltd, is an educational and reference program available for Android devices. The app allows students to review the content they have learned from textbooks in a fun and efficient way, using a game-like approach. By studying with books and then using the app to review during spare moments, students can reinforce their knowledge effectively and become reliable partners in their exam preparation.

One of the main features of the app is its thorough analysis of past entrance exams. The app creates quizzes by extracting questions from the "ランク順" series, which extensively analyzes previous entrance exam data. With the quizzes organized by difficulty level and topic, students can tailor their learning according to their specific goals.

Additionally, the app provides a solution for tackling areas that students find challenging. If a question is answered incorrectly in a quiz, the app displays the corresponding page in the textbook for reference. This allows students to revisit and review the content to strengthen their understanding.

Please note that as of April 3, 2023, there may be compatibility issues with the app on the latest version (13) of the Android OS. The developer is working on resolving this issue, and your patience is appreciated.

Please be aware of an important notice regarding server certificate switching. During internet connections, there may be warnings stating "The server the application is connecting to is not verified." If this warning appears, please select "Start session with trust" to proceed. This switching process is being implemented to enhance security, and once completed, the warning will no longer be displayed.

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