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Korean Time Master is a free browser game for practicing how to say the time in Korean. A clock appears on screen, you say the time out loud into your microphone, and speech recognition checks your answer right away. Every time is also spoken by a native Korean speaker so you can compare.
Start with hours only (세 시), then hours and minutes (세 시 이십삼 분), then seconds too (세 시 이십삼 분 사십오 초), and finish with a.m./p.m. and the full time (오후 세 시 이십삼 분 사십오 초). Each level has eight rounds and three lives; clearing a level unlocks the next.
No sign-up, no download — it runs in the browser on phone and desktop.