이동기 2019 공무원 영어 VOCA 최빈출 어휘 is a free educational application available for Android users. This app claims to help users learn 3,000 of the most frequently used English words for the civil service examination in Korea. The app is a mobile version of the book written by Professor Lee Dong-gwi, which covers the fundamental theories of English. The app provides users with 30 words per day for 100 days, allowing them to learn 3,000 words.

The app's interface is user-friendly and easy to navigate. The app's design is simple, with a white background and black text. The app has two sections: "Theory" and "Vocabulary." The "Theory" section of the app covers the basic theories of English, while the "Vocabulary" section provides users with the most frequently used English words for the civil service examination. This app is a useful tool for those who are preparing for the civil service examination in Korea. However, the app has some issues with downloading and updating, which can be frustrating for some users.