은/는 vs. 이/가
제가 학생이에요. 이름이 민수예요.
저는 학생이에요. 이름은 민수예요.
은/는 sets the topic or draws a contrast; 이/가 points at the subject, often new information.
Korean · 안녕하세요
Practice Korean by texting in it
Korean asks you to pick a speech level before you can finish a sentence, and textbooks rarely tell you whether you picked right. FluenText corrects the Korean you text — particles, endings and honorifics — against the register you chose for that chat.
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주말에 뭐 했어요?
저는 도서관에 공부했어요.
Grammar Coach Feedback
Particle
Original:
저는 도서관에 공부했어요.
Suggested:
저는 도서관에서 공부했어요.
에 marks a destination or a static location; the place where an action happens takes 에서.
Korean mistakes FluenText catches
The errors that survive years of study, because nobody in a real conversation stops to correct them.
Mixing 반말 and 존댓말
선생님, 어디 가?
선생님, 어디 가세요?
Casual endings with someone senior read as rude, however friendly you meant it.
Honorific verbs
할머니가 밥을 먹었어요.
할머니가 진지를 드셨어요.
Some verbs have separate honorific forms — 먹다 becomes 드시다, 자다 becomes 주무시다.
안 vs. 못
오늘 바빠서 안 가요.
오늘 바빠서 못 가요.
안 is chosen not to; 못 is cannot. Being busy makes it 못.
How Korean practice works
No lessons, no streak of flashcards. Just the conversations you would be having anyway.
01
Real conversationsText a friend — or an AI partner
Set a chat's language to Korean and message a friend who speaks it. No one to practice with? Open a chat with an AI conversation partner that replies at your level.
02
Instant correctionEvery message gets reviewed
Your Korean is checked as you send it. Mistakes come back highlighted right against your own sentence, tagged by category, with a clear explanation.
03
Ask follow-upsType @coach when you are stuck
Ask why a correction happened, how to say something more politely, or what a phrase means. The coach reads the thread and answers inline.
Speech level you set, register the coach checks
Pick casual, polite or formal for a chat and FluenText grades your endings against it. On auto it will not guess your relationship with the other person — but it still catches a message that mixes 해요 and 한다 in one breath.
Korean practice questions
It corrects against the level you set for that chat, and you can ask @coach why a specific ending was flagged. That is usually a faster way to learn the rule than memorizing a chart.
No. You can practice with an AI conversation partner that replies in Korean at the level you choose, then switch to real chats when you are ready.
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Free on iOS, with 25 coached messages a day. Nothing to schedule and no lesson to sit through.