The "공무원 영어 기출어휘문법 편" is an educational application available for iPhone users. Developed by SangJin Lee, this app focuses on vocabulary, grammar, and practical English for public service exams.

The main features of this app include sentence interpretation based on English sentence structure. The app aims to provide interpretations that follow English word order as closely as possible, while still allowing for faster comprehension in Korean through memorization. For example, the app presents questions like "The term 'subject' refers to something quite different from the more familiar term 'individual'. The latter term dates from the Renaissance and presupposes that man is a free, intellectual agent and ______ thinking processes are not coerced by historical or cultural circumstances." Users are then asked to choose the correct word to fill in the blank.

The app also excludes low-level vocabulary and offers a word bank feature. Users can select specific words or test themselves randomly. If a user chooses "I don't know" for a word during the test, its importance increases, increasing the likelihood of it being shown in future tests.