Calm Japanese review
Learn Japanese
without the noise.
Inku is a calm Japanese flashcard app for kana, vocabulary, and daily review.
7-day free trial. $49.99 / year or $3.99 / week. Cancel anytime.
Inside the real app
A quiet review loop, backed by a real catalog.
These are current Inku screens, not concept art. The verified catalog contains 2,701 vocabulary cards, 436 phrases, and 6,000 audio clips across 16 unlocked study bundles.
- N5-N1
- JLPT levels
- 3
- phrase packs
- 0
- accounts needed
Catalog snapshot verified 2026-07-10. Learning progress is stored on your phone; signed catalog updates may be downloaded by the app.
Open Inku.
See a few words or phrases from your next review.
Hear and review.
Listen, recall, then reveal the answer.
Build your habit.
Track progress and keep your streak going.
Spaced repetition that stays quiet.
Inku uses a modern spaced repetition system to show you the right card at the right time.
- 1 day
- 3 days
- 7 days
- 14 days
- 30+ days
Easier cards come back later. Harder cards get the attention they need.
Kana, words, and phrases ready to review.
Inku opens with 16 unlocked study bundles: kana, JLPT N5 through N1 vocabulary, topic decks, and useful phrase packs.
- あ
184 kana
Hiragana and katakana
Basic kana, voiced kana, and yoon forms for reading Japanese from the start.
- 水
551 cards
JLPT N5 cards
Beginner words for daily life, study, food, time, people, and places.
- 語
411 cards
JLPT N4 cards
The next step after N5, already available in the app library.
- 話
187 phrases
Casual phrases
What you say to friends. How to apologize, agree, ask for help without sounding textbook.
- 礼
107 phrases
Polite phrases
Formal Japanese for work, travel, and your first real conversation.
- 旅
55 phrases
Useful everyday phrases
Getting around Tokyo, Kyoto, Osaka. What to say at the station, the counter, the onsen.
One subscription. Everything unlocked.
Try Inku free for 7 days. After that, choose yearly or weekly. There are no ads and no extra lesson packs.
Everything included
- 16 unlocked study bundles from day one
- 2,701 vocabulary cards across JLPT N5 through N1
- 3 phrase packs: casual, polite, and travel
- Bundled audio for the main card library
- Handwriting practice for every kana
- Spaced repetition tuned for adult learners
- Four themes: Matcha, Sakura, Sun, Moon
- Core reviews and progress saved on your phone
- One-tap flag for any card that looks wrong
Answers, up front.
Is Inku a Duolingo alternative?+
Yes. Inku is for learners who want flashcards, audio-supported review, and short sessions instead of a busy game-style lesson feed.
Do I need an account?+
No. Inku does not ask for your email, your Apple ID, or anything else. Your progress lives on your iPhone.
Is there a free tier?+
Inku has a 7-day free trial. After that, it is paid. There are no ads.
What level of Japanese does Inku cover?+
Inku covers kana, 2,701 vocabulary cards across JLPT N5 through N1 and topic decks, plus 436 phrases in three packs. It is built for steady study from beginner foundations through advanced JLPT vocabulary.
Does Inku work offline?+
Core reviews, saved progress, and the bundled audio archive live on your iPhone. Purchases, restores, diagnostics, and any missing-audio fallback may use Apple or app services.
What about Android?+
Inku is iPhone-only for now. An Android version is not on the roadmap yet. If you want to be notified, email app@inkujapanese.com.
Can I use Inku with Anki?+
Yes. Use Inku for ready-made Japanese review and use Anki for custom cards outside Inku's library.
Is the content accurate?+
Each card is reviewed before release. If something looks wrong, flag it in the app and we can review it.