Q-Mental APP is a mental health application for university students developed by Kyushu University. Under the supervision of Associate Professor Kosuke Kajitani, a psychiatrist, students of Kyushu University (enrolled at that time) were responsible for the visual design. The development of this application was completed after a series of revisions conducted after university students actually used the prototype. There is no other mental health application in the world that has been created from the perspective of users (university students) in this way. The app has four functions: 1) "RECORD"—to record daily appetite, exercise, sleep, and mood; 2) "DIAGNOSIS"—to screen for mental illness; 3) "PERSONAL RECORDS"—to give advice based on the past week's "RECORD"; and 4) "COSULTATION"—to display a place to consult in conjunction with the map app. We hope this will be useful in supporting the mental health of university students. Please note that some of the "Sodan" functions are only available for Kyushu University students.