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About OtoOi Reader

OtoOi Reader is a Korean reading app with something new every day. Read real-life Korean the way it is written — online forum posts with their comment threads, short travel stories, and news written from the facts — sentence by sentence, with audio for every sentence. ■ What you can read • K-Drama Next Door — short dramas written in the style of Korean online forums: advice posts and real-life stories, comments and all. After the ending, the author explains the twist and the everyday life behind it. A new episode every day. • Kai's Train Trips — Kai rides the KTX to cities around Korea and discovers the local food. Travel notes with the facts and sources. • News — Korean news written from the facts, in an Easy and a Standard version. • Story — Kai's everyday life in Korea, told in short conversations (beginner level). ■ How it helps you read • Read first, then check: open the English translation one sentence at a time. • Tap a word for its meaning in that sentence, its dictionary form and how it is conjugated. • Tap an underlined grammar pattern for a short explanation of how it works in that sentence. • Audio for every sentence. • A TOPIK level for every piece, so you can find what fits you. ■ Words — see your Korean grow • Mark words and grammar as Known, Learning or Not yet while you read. • See how many TOPIK level 1–6 words and grammar patterns you know, level by level. • Your known-word rate on every piece shows what you can read next. • Word cards: check the meanings of words you met while reading, or marked Learning, in a five-option quiz, then update your Known and Learning marks from the results. Every sentence is written by us, so there is no material to hunt for. • Look back at your Known-words chart week by week (month by month with Pro). ■ Subscription New pieces are free for 7 days after they come out. Older pieces: the Korean text and audio are free; the translations, word meanings and explanations are part of OtoOi Reader Pro, along with all TOPIK levels and your full history in Words. 7-day free trial. Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless it is turned off at least 24 hours before the end of the current period. You can manage or cancel it in your App Store account settings. Terms of Use: https://otooi.com/en/terms Privacy Policy: https://otooi.com/en/privacy

What’s new

Version 1.5.0 · Updated November 3, 2026

• Word cards: check the meanings of words from the piece you're reading, or words you marked Learning, in a five-option quiz, then update your Known and Learning marks from the results. See how many seconds each answer took and review each word in its sentence with audio. • Before you save your marks, the words whose mark will change are outlined, with the change shown (for example, Not yet → Known). • See your Known-words chart 7 days at a time, going back week by week (or by month with a subscription). • New here? We suggest a first piece to read. • New-episode notifications now show the title. Tap one to open that piece.

App privacy

The developer, Yutaka Imai, reported these privacy practices to Apple.

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

  • Purchases: Purchase History
  • Location: Coarse Location
  • Identifiers: User ID, Device ID
  • Usage Data: Product Interaction

Used for: Analytics, App Functionality

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