김급식 is a free educational application designed for middle and high school students to easily access their school meal menus, class schedules, and academic calendars. Users can search for their school, register, and view daily meal options with a straightforward and intuitive interface.

The app also allows students to check their class schedules by registering their school, grade, and class. Schedules are automatically updated weekly. Additionally, students can view real-time meal photos shared by peers from other schools and earn points through various activities, such as daily attendance and meal photo uploads, which can be exchanged for mobile coupons for snacks and other goods.