Comparison

KanjiBox vs Satori Reader

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

Head to head
About

KanjiBox

Master Japanese language skills offline with interactive drills, quizzes, and flashcards. Track progress with detailed stats and game-like achievements. Includes handwriting practice and preparation for standardized tests.

Highlights
  • Offline Japanese study
  • Drills, quizzes, and flashcards
  • Handwriting practice modules
  • Progress tracking and achievements
  • JLPT and Kanji Kentei preparation
  • Adaptive learning with SRS
  • Customizable study sets
Features
Read full description

KanjiBox is a focused Japanese kanji and vocabulary trainer for learners at every level, from first-time beginners to advanced JLPT N1 candidates. • Simple yet effective algorithm Spaced Repetition System and smart Multiple Choice algorithm, combined to optimize your learning and track your progress • Multiple Modes to keep you motivated From Flashcards, to Drill training, to Gamified Quiz • No AI Slop KanjiBox was first released 19 years ago, and has helped hundreds of thousands achieve written Japanese mastery ever since. It does not, and will never, rely on half-baked LLM-driven content — — — — — — — — — — — — — KANJIBOX IS SMART — — — — — — — — — — — — — KanjiBox adapts to your performance by prioritizing items you struggle with, and reducing repetition of material you already know. As you progress, it will introduce new kanji and vocabulary, but always while following your pace. Spend more time on what needs work, and less time reviewing what you have already mastered. — — — — — — — — — — — — — KANJIBOX IS A MEAN TEACHER — — — — — — — — — — — — — Behind the deceptively simple Multiple Choice Question format, is a well-oiled algorithm designed to trip you up: similar-looking kanji, subtle pronunciation differences, closely-related grammatical words… Because the goal is to learn the language, not how to beat the test. — — — — — — — — — — — — — KANJIBOX IS ENGAGING — — — — — — — — — — — — — Exhaustive stats across levels and categories show you what you have mastered, what needs more practice, and how your results improve over time. Quiz mode adds a fun competitive element to your studying. Because serious should not mean tedious! — — — — — — — — — FEATURES — — — — — — — — — • Full JLPT N5–N1 kanji and vocabulary coverage • Sensei mode with 6,355 kanji, ~40,000 vocab words • Beginner mode with hiragana and katakana • Works fully offline • Custom Study Sets • Sync all learning stats and progress across devices • Add-ons to practice handwriting kana and kanji • Add-ons to practice specific grammar points Whether you are preparing for the JLPT, studying Japanese at school, or building your reading ability for everyday use, KanjiBox gives you a clear and practical way to improve. 始めましょう!Let's get started!

About

Satori Reader

Enhance your Japanese reading and listening skills with engaging stories written by native speakers. Features adaptive kanji, smart definitions, and spaced repetition to build vocabulary. Get clarity with friendly annotations and human feedback.

Highlights
  • Compelling stories by native speakers
  • Audio narration by voice actors
  • Adaptive kanji presentation
  • Smart word definitions
  • Friendly annotations
  • Spaced repetition vocabulary review
  • Human feedback and support
Features
Read full description

Ready to take your Japanese reading and listening comprehension to the next level? Welcome to Satori Reader. COMPELLING STORIES Read from a growing library of engrossing stories written by native speakers for intermediate students, across genres such as fantasy, slice-of-life, thrillers, documentaries, news, and more. AUDIO Tap any sentence to hear it read aloud by native voice actors (no robots!). ADAPTIVE KANJI USAGE Crack the chicken-and-egg problem of reading kanji with our unique presentation engine, which adjusts the Japanese text to accommodate your actual knowledge. This allows you to challenge yourself for the kanji you should know without being overwhelmed by what you don't. SMART DEFINITIONS Tap any word for a definition. This is more than just an automated lookup. Satori Reader shows the actual sense of each word as it's being used in the sentence. For example, the particle の has many uses: it can indicate possession; it can turn the preceding verb or phrase into a noun; it can stand in for another word; and more. We show you exactly what is happening in every instance of every word. FRIENDLY ANNOTATIONS Gray underlines indicate longer annotations that break down tricky expressions, provide cultural background, or help you to read between the lines. Our editors work hard to anticipate what might be confusing and proactively help you to make sense of things. Good-bye, confusion. Hello, clarity! SPACED REPETITION SYSTEM (SRS) The built-in spaced repetition review system helps you to build your vocabulary. Create review cards instantly as you read. Each card you create takes along a snapshot of the sentence in which you encountered the word, further helping to cement it in your memory. You can even play back the audio of that sentence while reviewing the word! HUMAN FEEDBACK Still confused about something? Just ask in the discussion section below each episode. Our team of friendly human beings is ready to help. Satori Reader is built by a team that cares. Our goal is to bring satori (enlightenment) into your Japanese reading life. Set up a free account today, and let's get started. SUBSCRIPTION DETAILS ▪ OPTIONS: Download the app for free and enjoy unlimited access to the first two episodes of each series (new series released regularly), plus complete access to special series such as Closeup: Obon Society. Subscribed for unlimited access to the entire Satori Reader library of more than 1200 episodes (new episodes released each week), including crystal-clear audio, helpful annotations, and real human feedback. Try your first month FREE (limit one per customer; cannot be used in combination with other introductory offers; offers subject to change). ▪ EXTRAS: Your subscription to Satori Reader comes with complimentary web access, as well as access to Satori Reader on all your smartphones and tablets. ▪ PRIVACY POLICY: https://www.satorireader.com/privacy ▪ TERMS OF SERVICE: https://www.satorireader.com/terms ADDITIONAL SUBSCRIPTION DETAILS ▪ Payment will be charged to your iTunes Account at confirmation of purchase (following any trial period). ▪ Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. ▪ Account will be charged for renewal within 24 hours prior to the end of the current period, and identify the cost of the renewal. ▪ Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. ▪ Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. ▪ Cancel your subscription at any time. If you cancel, you will retain full access to Satori Reader for the period you paid for and you will not be billed again. If you have any questions, write to support@satorireader.com for speedy assistance. Thank you for your business!

Screenshots

KanjiBox4 screens
Satori Reader4 screens

Verdict

The call

The clearest difference is price: Satori Reader at Free against KanjiBox's $4.99. Satori Reader also leads on rating (4.8 vs 4.6). KanjiBox's advantage is update cadence (weekly vs every 3 months). On review sentiment, ratings volume, ads and in-app purchases 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

Satori Reader is free to download; KanjiBox costs $4.99 up front. KanjiBox sells 8 one-off in-app purchases and Satori Reader sells 3 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Satori Reader holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 138 and 218 respectively. Written reviews complicate that: 93% of KanjiBox's written reviews are positive against 90% of Satori Reader's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

KanjiBox ships an update weekly, Satori Reader every 3 months. The most recent releases landed on October 20, 2026 and October 18, 2026 respectively.

Scorecard3 real differences · 7 level
KanjiBox versus Satori Reader: the parameters behind the verdict, then further details
ParameterKanjiBoxSatori Reader
Price$4.99Free — better
Rating4.6 (138 ratings)4.8 (218 ratings) — better
Positive reviews92.8% of reviews — better90.2% of reviews
Number of ratings138218 — better
Update frequencyWeekly — betterEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size361 MB79 MB
Age rating9+12+
DeveloperUnknown Genius SoftwareBrak Software, Inc.

Customer experience

KanjiBox

All ratings138 ratings
Positive91.3%
Neutral2.9%
Negative5.8%
Written reviews264 reviews
Positive92.8%
Neutral3.8%
Negative3.4%

Satori Reader

All ratings218 ratings
Positive95.0%
Neutral2.3%
Negative2.8%
Written reviews174 reviews
Positive90.2%
Neutral2.3%
Negative7.5%

User reviews

KanjiBox

From 138 App Store ratings

What we love

  • 👍 Comprehensive kanji and vocabulary practice
  • 🚀 Efficient spaced repetition learning
  • 💡 Customizable study settings
  • 🚀 Syncs progress across devices
  • 👍 Integrates with dictionary app

Room to improve

  • 🐛 Occasional crashes or bugs
  • 👎 Limited grammar practice
  • 👎 Sensitive kanji writing recognition
  • 👎 Repetitive kanji/vocabulary selection

Satori Reader

From 218 App Store ratings

What we love

  • 🚀 Excellent for improving reading and listening skills
  • 👍 Detailed grammar and vocabulary explanations
  • 🎨 Customizable display settings for kanji/furigana
  • 💡 Integrated spaced repetition flashcard system
  • 🎧 High-quality voice acting and audio

Room to improve

  • 🐛 Occasional app crashes or sync issues
  • 🕰️ Lack of speed control for audio playback
  • 💰 Subscription-based model can be expensive
  • 🔍 Limited search/navigation functionality

Bugs and requests

KanjiBox

Reported bugs

3 issues
  • App crashes when launching at higher JLPT levels
  • Syncing issues between mobile and web versions
  • Incorrect kanji/vocabulary definitions in some cases

Requested features

4 requests
  • Add more grammar and sentence-level practice
  • Improve kanji writing recognition accuracy
  • Allow searching for specific kanji or vocabulary
  • Provide more detailed review of missed questions

Satori Reader

Reported bugs

2 issues
  • Login issues and account creation problems
  • Syncing and loading delays on some devices

Requested features

4 requests
  • Dark mode option
  • Ability to loop audio playback
  • Kanji lookup/learning tools integration
  • More advanced/diverse content selection

In-app purchases

8 purchases

KanjiBox

One-time8
  • KanjiDraw$0.99
  • KanaDraw$0.99
  • Grammar - Beginner I: Particles$0.99
Show 5 more
  • Grammar - Intermediate I$0.99
  • Grammar - Beginner II: Where? When?$0.99
  • Grammar - Beginner III: 後, 前, 上, 下...$0.99
  • Advanced I: ところ+に,で,へ,を...$0.99
  • Vocab N5 Nouns (pt. 1)$0.99
3 purchases

Satori Reader

Subscriptions3
  • Satori Reader Monthly1 Month trial4 variants$8.991 Month
  • Satori Reader Annual1 Month trial$89.991 Year
  • Satori Reader Annual1 Year trial3 variants$89.991 Year

Questions

Is KanjiBox free?
KanjiBox costs $4.99, and also offers in-app purchases.
Is Satori Reader free?
Satori Reader is free to download, with in-app purchases available.
Which has better reviews, KanjiBox or Satori Reader?
Satori Reader is rated higher. KanjiBox averages 4.6 out of 5 from 138 ratings, while Satori Reader averages 4.8 from 218 ratings.
Do KanjiBox or Satori Reader have ads?
Neither KanjiBox nor Satori Reader shows ads.
Which is updated more often, KanjiBox or Satori Reader?
KanjiBox ships an update weekly, and Satori Reader every 3 months. Most recently, KanjiBox was updated on October 20, 2026 and Satori Reader on October 18, 2026.

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