켜자마자 중국어 is an Android application developed by Word Apps that helps users learn Chinese vocabulary effortlessly. The app is free and falls under the Education & Reference category. It offers a unique learning experience by showing users a new word every time they turn on their phone. The app's database includes over 15,000 words, including everyday words, HSK words, commonly used characters, conversational phrases, idioms, and Chinese proverbs.

Users can study the pronunciation of each word using the app's simple phonetic system. The app provides accurate audio and Korean pronunciation, making it easy for beginners to learn. The app also includes essential Chinese expressions, idioms, and proverbs that are commonly used by native Chinese speakers.

Overall, 켜자마자 중국어 is a must-have app for anyone who wants to learn Chinese vocabulary effortlessly. With its unique concept and extensive database, users can learn new words anywhere, anytime, without dedicating a lot of time to studying.