Comparison

Kanji Rocket vs Ben

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Kanji Rocket

This app helps intermediate learners master kanji and vocabulary through interactive lessons, games, and revision exercises. It uses effective learning techniques in bite-sized tasks and fun challenges to boost fluency.

Highlights
  • Bite-sized learning tasks
  • Capitalizes on existing knowledge
  • Fun challenges and games
  • Level up skills through chats
  • Interactive lessons and revision
Features
Read full description

Boost your vocabulary fast by learning kanji in context — perfect for intermediate users ready to rocket to fluency! Welcome to Kanji Rocket, a dynamic app designed to make learning kanji fun and engaging. Kanji Rocket combines interactive lessons, games, and revision exercises to help intermediate learners master kanji and vocabulary quickly! Key Features: * Uses the best learning techniques, broken down into bite-sized tasks * Capitalizes on your existing knowledge, ideal for intermediates * Fun challenges and tasks to keep you motivated * Level up your skills through chats and games with bots and friends Download and get started today! Privacy Policy: https://kanjirocket.app/privacy-policy Terms of Use: https://kanjirocket.app/end-user-agreement

About

Ben

Features
Read full description

ben-kyo turns the Japanese you actually hear in daily life into vocabulary you remember. Record a conversation — a lesson, a chat with a friend, something overheard on the train — or import an audio file you already have. ben-kyo transcribes it on your device, no account or internet connection required. STUDY AT YOUR LEVEL Choose a JLPT level from N5 to N1, and ben-kyo scans the transcript for vocabulary at exactly that level, using a built-in Japanese dictionary. Each word it finds gets translated and added to your personal word list, tagged with the sentence it came from — so you always remember where you first heard it. REVIEW THE SMART WAY Every word you save gets its own flashcard, scheduled with the same spaced-repetition algorithm (SM-2) that Anki is built on. Grade yourself Again, Hard, Good, or Easy after each card, and ben-kyo adjusts when you'll see it next — so you spend your time on the words you actually struggle with, not the ones you already know. PRACTICE WITH YOUR OWN WORDS Generate a short practice conversation built entirely from words in your own list, at the difficulty level you choose. It's a quick, low-pressure way to see your vocabulary used in context before you try it out in real life. PRIVATE BY DESIGN ben-kyo runs entirely on-device using Apple's Speech, Translation, and on-device language frameworks. There's no sign-up, no account, no server, and your recordings and word list never leave your phone. Whether you're studying for the JLPT or just trying to hold onto the Japanese you pick up day to day, ben-kyo turns real conversations into a vocabulary list — and a study habit — that actually sticks.

Screenshots

Kanji Rocket4 screens
Ben4 screens

Verdict

The call

The clearest difference is in-app purchases: Ben at none against Kanji Rocket's 3. Ben also leads on ads (none vs shown). Kanji Rocket's advantage is update cadence (every 2 days vs every 6 days) and iOS requirement (13.4 vs 18.0). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Kanji Rocket sells 3 in-app purchases, starting at $4.99 per month. Ben asks for nothing beyond the download.

UpkeepUpdate frequency

Kanji Rocket ships an update every 2 days, Ben every 6 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Kanji Rocket versus Ben: the parameters behind the verdict, then further details
ParameterKanji RocketBen
PriceFreeFree
Rating3.5 (2 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 days — betterEvery 6 days
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.4 — better18.0
Further details — not scored
Size38 MB7 MB
Age rating4+4+
DeveloperKanji Rocket LtdMatthias Frey

In-app purchases

3 purchases

Kanji Rocket

Subscriptions3
  • Astronaut Candidate$4.991 Month
  • Mission Specialist$9.991 Month
  • Flight Commander$14.991 Month
None

Ben

No in-app purchases

Questions

Is Kanji Rocket free?
Kanji Rocket is free to download, with in-app purchases available.
Is Ben free?
Ben is free to download, with no in-app purchases.
Do Kanji Rocket or Ben have ads?
Kanji Rocket shows ads; Ben does not.
Which is updated more often, Kanji Rocket or Ben?
Kanji Rocket ships an update every 2 days, and Ben every 6 days. Most recently, Kanji Rocket was updated on October 30, 2026 and Ben on October 31, 2026.

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