This study aims to present app development procedures and models for Mobile Assisted Sino Korean Vocabulary Learning. It is based on learning content through the principle of word formation. Using Keller's ARCS Motivation model, the design of the Sino Korean Vocabulary learning mobile app, app flow chart, and app screens were created. The paper discusses mobile learning, which is connected to paper textbooks, and is useful in reinforcing a learners’vocabulary. Mobile Assisted Vocabulary Learning (MAVL) allows students to use mobile devices on their own for self-directed learning without any time and space constraints. This study will contribute to the development of mobile vocabulary learning apps in the future. (Sookmyung Women’s University)