Daebak: Korean Diary with AI

Learning Korean but still afraid to write a whole sentence? Start with one line.
Daebak is a Korean diary with AI feedback that never uses a red pen. Write about your day, and Hihi finds something to praise first, then explains what to fix in your own language.

WHY WRITING, AND WHY A DIARY

Flashcards teach you words. Writing teaches you Korean. The problem with writing practice is finding something to write about, and a diary solves that permanently: your own day is the one topic you never run out of.

TWO WAYS TO WRITE

- Start in English: write your day in your own language first, then move it into Korean. Recommended if you're a beginner.
- Write in Korean: go straight into Korean when you feel ready.
- Stuck halfway through a sentence? Hints give you words and sentence shapes with romanization, never the finished sentence. Building it yourself is the whole point.
- New to typing Hangul? Onboarding walks you through adding a Korean keyboard to your phone.

FEEDBACK THAT DOESN'T FEEL LIKE A TEST

Hihi reads your entry and checks the six points of Korean grammar that learners actually get wrong:

- Spelling
- Spacing
- Particles (은/는, 이/가, 을/를 and friends)
- Word order
- Politeness level
- Natural phrasing

Every suggestion comes with a one-line reason you can understand, and a compliment always comes first. Mistakes are highlighted, not crossed out in red. Ask a follow-up question right inside your feedback, like "what's the difference between 은/는 and 이/가?"

KOREAN GRAMMAR, EXPLAINED IN YOUR LANGUAGE

If English isn't your first language either, translating the grammar explanation is a second job. So pick the language it arrives in: English, Korean, Japanese, Chinese, Vietnamese, Indonesian, Thai, Malay, Filipino, Spanish, Portuguese, French, German, Italian, Russian, Turkish, Polish, Hindi or Arabic. Nineteen options, switchable any time.

SPEAK, NOT JUST WRITE

- Chat with Hihi in Korean about what you just wrote.
- Switch between 존댓말 (polite) and 반말 (casual) and feel the difference inside one conversation.
- Tap Hihi's bubbles to reveal the translation in your language, tap again to hide it.

SEE YOURSELF GET BETTER

- A level from 1 to 6, scored from your own writing, with a trend chart.
- Weekly report: days written, expressions saved, and the top three things you keep polishing.
- A mood calendar built from your entries. A record, not a diagnosis.
- Writing streaks, and manuscript-paper squares that fill up as you write.

KEEP THE WORDS YOU LIKE

Save any phrase from your feedback into your notes, with its romanization, then review it as a card with the meaning hidden until you tap.

A DIARY SHOULD BE PRIVATE

- No account, no sign-in. Your diary is stored on your phone, and text goes to the AI only when you ask for feedback, hints or chat.
- App lock with your fingerprint or screen lock.
- Privacy mode sends a summary instead of today's diary text when you chat.
- Back up everything as JSON, or export your diary as CSV, whenever you want.

Writing a few honest lines every day is also solid preparation for the writing section of the TOPIK exam.

Free to use: AI feedback 3 times a day and 10 chat turns per diary entry, with more if you choose to watch a short ad. No banner ads on the writing, feedback or chat screens. AI suggestions are for reference and are not always right.

한 줄이면 충분해요. One line is enough. Start today.