中学生漢字５分間トレーニング is an educational app developed by NOWPRODUCTION CO.LTD. It is designed specifically for middle school students to practice writing kanji characters and memorizing three and four-character idioms. The app contains a total of 2,170 questions, ranging from basic to advanced levels, covering essential knowledge for middle school students.

The practice questions are presented in sets of five, allowing users to efficiently practice kanji characters during their free time. For difficult characters, the app provides a large display with animated stroke order, making it ideal for confirming the correct writing of kanji characters that users are unsure about.

Incorrectly answered questions are automatically added to the "Check Questions" section, allowing users to efficiently review and reinforce their learning at any time.

In addition to the kanji drills, the app also offers drill tests, four-character idioms quizzes, challenge stages, and a check questions section for reviewing specific topics. Users can customize the app's settings, including background and pen settings, as well as recognition preferences.

Please note that this app utilizes Panasonic Corporation's handwriting recognition engine, "Raku Hira," to accurately recognize handwritten characters. The app displays advertisements, but there are no restrictions on its functionality.