Comparison

AnnoReader vs Kisui Study

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

Head to head
About

AnnoReader

This app visually breaks down English sentences to improve grammar understanding and reading comprehension. It offers annotation, translation, and text-to-speech features to aid learners in mastering sentence structure and fluency.

Highlights
  • Visual syntax analysis of sentences
  • Phrase and clause translation
  • Text-to-speech with accent options
  • AI grammar checking
  • OCR for text capture
  • Dictionary lookup and phrasal verb meanings
Features
Read full description

AnnoReader: English Grammar Learning Tool AnnoReader is an "English Grammar Learning Tool" designed for English language learners. It helps improve reading comprehension by making sentence structure and modification relationships instantly visible. Purpose This app was developed to address common challenges faced by English learners, such as: - Wanting to learn English grammar more effectively - Difficulty identifying phrases and clauses - Trouble distinguishing the five sentence patterns (SVOC) - Preparing for long passages in tests like TOEIC - Desire to read more fluently With translation and text-to-speech features, AnnoReader can also be used for listening and speaking practice beyond grammar study. Key Features English Annotation (Syntax Analysis) - Visualizes clauses, phrases, and modification relationships - Displays parts of speech for words - Provides dictionary lookup for words - Shows meanings of phrasal verbs - Highlights the five sentence patterns (SVOC) - Underlines compound words Translation - Displays translations by phrase and clause units - Supports various languages, including Japanese Text-to-Speech - High-quality native speaker voice for reading English text - Four accent options: American, British, Australian, and Indian - Allows simultaneous grammar and listening practice - Repeat function and timed rewind feature for enhanced learning AI Grammar Check - AI-powered checking of inputted English text - Easily identifies grammatical errors and typos Camera Function (OCR) - Captures English text from books or documents using the built-in camera - Performs annotation on the captured text Multiple Input Methods - Direct text input - Paste from clipboard - Import text via iOS share function Customization Settings - Adjustable font and annotation settings to suit user preferences For more information: - Terms of Service: https://annoreader.com/ja/terms_of_service - Privacy Policy: https://annoreader.com/ja/privacy

About

Kisui Study

Features
Read full description

Kisui is a focused spaced repetition flashcard app for building vocabulary with your own decks. Import custom decks, study what is due today, and let Kisui schedule the next review based on how well you remember each card. Each study session is simple: see the word, reveal the meaning, then rate your recall with Again, Hard, Good, or Easy. Kisui is built for language learners who want rich recall cards without a cluttered workflow. Features: - Study with pronunciation, definitions, examples, images, and local audio - Review cards using an FSRS-based spaced repetition scheduler - See your daily queue split into New, Learning, and Review cards - Track mastered progress for each deck - Mark words as mastered to skip them across decks - Auto-play card audio during study - Keep your study progress stored locally on your device

Screenshots

AnnoReader4 screens
Kisui Study3 screens

Verdict

The call

The clearest difference is in-app purchases: Kisui Study at none against AnnoReader's 4. Kisui Study also leads on ads (none vs shown) and update cadence (every 2 days vs monthly). AnnoReader's advantage is iOS requirement (15.6 vs 17.0). On price and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. AnnoReader sells 4 in-app purchases, starting at $1.49 per month. Kisui Study asks for nothing beyond the download.

UpkeepUpdate frequency

AnnoReader ships an update monthly, Kisui Study every 2 days. The most recent releases landed on October 7, 2026 and September 20, 2026 respectively.

Scorecard4 real differences ยท 4 level
AnnoReader versus Kisui Study: the parameters behind the verdict, then further details
ParameterAnnoReaderKisui Study
PriceFreeFree
Positive reviews69.2% of reviewsโ€”
Update frequencyMonthlyEvery 2 days โ€” better
AdsYesNo โ€” better
In-app purchasesYesNo โ€” better
MonetizationFree with in-app purchasesโ€”
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS15.6 โ€” better17.0
Further details โ€” not scored
Size95 MB3 MB
Age rating4+4+
DeveloperHironobu SaitoZHANG YIQUN

In-app purchases

4 purchases

AnnoReader

Subscriptions4
  • Basic(monthly)7 Days trial$1.491 Month
  • Basic Plus(Monthly)7 Days trial$3.491 Month
  • Pro(Monthly)$4.991 Month
Show 1 more
  • Pro Plus (Monthly)$11.991 Month
None

Kisui Study

No in-app purchases

Questions

Is AnnoReader free?
AnnoReader is free to download, with in-app purchases available.
Is Kisui Study free?
Kisui Study is free to download, with no in-app purchases.
Do AnnoReader or Kisui Study have ads?
AnnoReader shows ads; Kisui Study does not.
Which is updated more often, AnnoReader or Kisui Study?
AnnoReader ships an update monthly, and Kisui Study every 2 days. Most recently, AnnoReader was updated on October 7, 2026 and Kisui Study on September 20, 2026.

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