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“I improved more in 2 weeks than 6 months of self-study.”— Emma, beginner
Korean Diary AI corrects grammar, vocabulary, and naturalness in seconds — and explains why it sounds unnatural, not just that it’s wrong. 10 free corrections on your first day.
Correction complete · 2.4 s
CORRECTION ① 좋았어서 → 좋아서
'좋았어서' (past reason) sounds unnatural here. '좋아서' (present-state reason) is natural when describing a condition that led to an action.
💡 Tense — '~었어서' is rarely natural as a reason clause
CORRECTION ② 같이 → 함께
Both mean 'together', but '함께' sounds warmer and more natural in diary writing.
💡 Register — 함께 reads more naturally in written Korean
CORRECTION ③ 이야기를 했어요 → 이야기를 나눴어요
'이야기를 나누다' (to share a conversation) is the native expression. '이야기를 하다' is technically correct but less natural.
💡 Collocation — fixed verb pairing native speakers use
CORRECTION ④ 공원에 걸었어요 → 공원을 걸었어요
With motion verbs like '걷다', use '을/를' to mark the path. '에' marks a destination, not a path walked through.
💡 Particle misuse (에→을) — most common error for learners
💡 Korean-specific feedback — catches errors general AI tools miss
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Simple process
Three steps, five seconds, to better Korean.
01
Write
Write anything in Korean — a diary, a thought, a short story. Any level, any topic.
02
Correct
AI instantly finds grammar issues, unnatural expressions, and spelling errors with English explanations.
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03
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만났어요→만났습니다
만났어요 → 만났습니다 (formal)
Natural: 카페에서 수다를 떨었어요
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How we compare
Built for Korean writing
| Feature | Korean Diary AI | Duolingo | iTalki | ChatGPT |
|---|---|---|---|---|
| Instant correction | ✓ | — | — | — |
| English explanations | ✓ | — | ✓ | ✓ |
| Natural alternatives | ✓ | — | — | — |
| Learning summary | ✓ | — | — | — |
| Writing history | ✓ | — | — | — |
| Free plan available | ✓ | ✓ | — | ✓ |
What learners say
Written entries, real progress.
I improved more in 2 weeks than 6 months of self-study.
Emma K.
Germany · Beginner
The English explanations make it click instantly. No more guessing.
James T.
USA · Intermediate
Writing every day feels easy now. The corrections never feel harsh.
Yuki M.
Japan · Elementary
Common questions
What makes Korean Diary AI different?
- Is Korean Diary AI different from ChatGPT?
- Yes. ChatGPT gives general corrections. Korean Diary AI focuses specifically on what sounds unnatural to native Korean speakers — not just grammar rules, but flow and context.
- How many corrections do I get for free?
- 10 on your first day. 3 per day after that, forever. No credit card needed.
- Who is this for?
- Korean learners at any level who write in Korean and want to know exactly what to improve — not just that something is wrong.
Is it really free?+
Yes — the free plan gives you 10 corrections on your signup day, then 3 corrections/day — forever free. No credit card required.
What level of Korean do I need?+
Any level! Beginners can write simple sentences, and advanced learners can tackle complex diary entries.
How accurate are the corrections?+
We use Claude AI to provide corrections. It understands context, not just rules, so explanations are natural and accurate.
Can I use this to prepare for TOPIK?+
Absolutely. The writing style and feedback aligns with TOPIK essay requirements, making it a great daily practice tool.
What languages are the explanations in?+
Explanations are in English. Korean Diary AI is designed for English speakers learning Korean.
How does the Pro plan differ from Free?+
Pro gives you unlimited corrections, full writing history access, and deeper learning summaries.
What is your refund policy?+
You can cancel anytime — your Pro access continues until the end of your current billing period, with no prorated refunds for mid-cycle cancellations. Full policy in our Terms of Service →
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