K-Word Booster

K-Word Booster is a comprehensive vocabulary trainer designed for intermediate Korean learners targeting TOPIK Level 4. It includes 3,600 core Korean words with natural example sentences, native speaker audio, and AI-powered pronunciation scoring. The app encourages active speaking practice with repetition and fluency modes, allowing learners to train their pronunciation and speaking confidence.

The extension features an automated review system that ensures words are mastered before removal, reducing study fatigue and improving retention. It also offers hands-free auto-playback for convenient learning during commutes or multitasking. Perfect for learners who want to build sustainable Korean skills beyond memorization, K-Word Booster supports listening, speaking, and self-assessment to help users quickly advance from beginner to intermediate proficiency.