Inku vs Rocket Japanese for Japanese
Rocket Japanese is a structured course you buy for life. Inku is a Japanese vocabulary, phrase, kana and kanji study routine.
Short answer
- Category:
- Lifetime-access language course
- Pricing:
- Course levels with lifetime access; free trial (App Store, October 16, 2026)
On this page
How does Inku compare to Rocket?
Inku publishes this comparison. The Rocket Languages App Store listing describes lifetime access to structured lessons, more than 60 hours of interactive audio lessons and more than 60 hours of language and culture lessons per level, writing practice for Japanese and voice recognition. Inku is a smaller study routine that teaches Japanese words, phrases and characters and reviews them with FSRS.
When is Inku the better choice?
- You want short daily study. An Inku lesson teaches five items, and reviews last as long as your due cards. Rocket's lessons are longer course units.
- You want JLPT vocabulary and kanji review. Inku has vocabulary decks for every JLPT level from N5 to N1 and a kanji course (960 kanji from N5 to N1).
When is Rocket the better choice?
- You prefer to own a course. Rocket sells lifetime access to its levels. Inku is a subscription.
- You want grammar and culture lessons. Rocket includes language and culture lessons. Inku does not teach grammar.
- You want speaking practice. Rocket's listing describes voice recognition. Inku does not check your pronunciation.
Inku and Rocket side by side
Scroll sideways to see the full table.
| Criterion | Inku | Rocket |
|---|---|---|
| Format | Lessons of five items and spaced review | Audio, culture and writing lessons |
| Grammar | Not taught | Taught |
| Payment | Subscription | Lifetime access per level |
| Kanji course | 960, N5–N1 | Writing practice in lessons |
Our take
Rocket Japanese is a course and Inku is a review routine. The course teaches new material; Inku helps you keep vocabulary and characters.
Verdict
Choose Rocket for a full course with lifetime access. Choose Inku for focused daily vocabulary, kana and kanji review.
If you take a course like Rocket, Inku can sit beside it as your daily vocabulary and kanji review.
How we research this
Inku publishes this comparison, so it is not neutral. We check competitor claims against their official websites, help pages and App Store listings (last checked October 16, 2026), and Inku claims against the current iPhone listing and web app. Inku's pronunciation audio is synthesized speech, not human recordings. Found an error? Email hello@inkujapanese.com and we will correct it.
Common questions
Does Rocket Japanese teach kanji?
Rocket's listing describes writing practice for Japanese. Inku has a separate kanji course with lessons and review.
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Sources and pricing
Pricing last checked: October 16, 2026. Prices can vary by country, platform, checkout, tax, and promotion.
