This app is a vocabulary trainer designed for intermediate Korean learners. It targets learners who have mastered basic grammar and vocabulary and are aiming for TOPIK Level 4. The app systematically guides users through 3,600 essential words they need to understand and use at this level. This is not just a memorization tool — it supports listening, speaking, repeated review, and self-assessment. It helps users improve their pronunciation and build sustainable Korean learning habits with less stress over time. Target Users Learners who have completed Korean basics Learners aiming for TOPIK Level 4 Those who want to practice speaking and pronunciation, not just memorize words Users who benefit from repetitive and automated review Key Features 1. 3,600 Essential Words Included Covers core vocabulary for TOPIK Level 4. Each word comes with definitions, example sentences, pronunciation, and usage context. Sentences are natural and practical for everyday situations. 2. Pronunciation Practice & Auto-Scoring Native Korean audio is provided for all words and sentences. Users can record their own pronunciation and receive an automatic accuracy score. The AI-based scoring system provides real-time feedback. 3. Speaking Practice Mode Practice speaking by repeating example sentences aloud. Train your fluency and gain confidence. Each sentence can be repeated 5 times for pronunciation and memorization. 4. Repetition & Auto-Mastery System Words are repeatedly reviewed until mastered. Once a word is learned accurately several times, it is removed from the active study list. This reduces learning fatigue and increases focus. 5. Auto-Playback Review Mode Review vocabulary and sentences hands-free — during commutes, before bed, or while multitasking. We recommend speaking along while listening during auto playback. ===================================== Terms and Conditions of Service : https://natural-square-6f8.notion.site/Terms-and-Conditions-of-Service-21d0463817fc4fd5bacc3cf94621d7e9 Privacy Policy : https://natural-square-6f8.notion.site/Privacy-Policy-d46e2540e9c4445c950b1d31e6fc4c90