Grader is an Android application developed by School Checker that allows teachers to check student's papers accurately and quickly. This free app is convenient for teachers to grade papers anywhere and anytime using their mobile phone. It can be used to check exams, homework, quizzes, and other assignments.

The app is designed to be fast and efficient. Teachers can scan multiple answer sheets continuously, and the system will display the correct and incorrect answers along with the scores instantly. The results are saved on the website, which reduces the time needed to check the papers manually. Grader is also precise in detecting any errors, regardless of the answer sheet's orientation. Teachers can view the answer sheet data to check for any mistakes, such as selecting multiple answers, leaving a question blank, or entering the wrong student ID.