SNU LEI Hangeul is an educational application designed to help foreign learners grasp the sounds and shapes of the Korean alphabet. With a focus on step-by-step learning, users can practice Korean pronunciation and writing on their iPhones. The app provides numbered stroke orders for easy understanding and direct writing practice on the device.

For vowels, learners can observe native speakers' mouth shapes in video clips. The voice-recording feature allows users to record and compare their pronunciation with that of native speakers, facilitating improvement. Available in English, Japanese, and Chinese, this app offers interactive learning units with practice functions to enhance proficiency.