# AnnoReader vs Kisui Study

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.

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.

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

## The numbers

| Metric | AnnoReader | Kisui Study |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 69.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 95 MB | 3 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hironobu Saito](https://appshunter.io/developer/1557456154) | [ZHANG YIQUN](https://appshunter.io/developer/496173584) |

## What reviewers say

### AnnoReader

[App page](https://appshunter.io/ios/app/annoreader/id1557456152)

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:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic(monthly) | $1.49 | per month |
| Basic Plus(Monthly) | $3.49 | per month |
| Pro(Monthly) | $4.99 | per month |
| Pro Plus (Monthly) | $11.99 | per month |


### Kisui Study

[App page](https://appshunter.io/ios/app/kisui-study/id6775208502)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*