“…Matsui et al 8 made it possible to quantitatively evaluate CM by video recording the G&R test. In addition, Matsui et al 9 focused on the fact that CM's symptoms are similar to those of CTS; they applied the G&R test to CTS screening and developed a smartphone-based application that screens for CTS by video-recording the G&R test. Although Matsui et al 8,9 evaluated hand disorders using mobile devices, they focused on the G&R test, which did not aim to integrate their screenings into our lives.…”