# PDF Book Read vs ClaviSay

The clearest difference is in-app purchases: ClaviSay at none against PDF Book Read's 2. ClaviSay also leads on update cadence (weekly vs every 3 weeks) and iOS requirement (13.0 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. PDF Book Read sells 2 in-app purchases, starting at $1.99 per year. ClaviSay asks for nothing beyond the download.

PDF Book Read ships an update every 3 weeks, ClaviSay weekly. The most recent releases landed on October 18, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | PDF Book Read | ClaviSay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/clavisay-language-practice/id6776266342/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 9 MB | 49 MB |
| Requires iOS | 26.2 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yuya Takamoto](https://appshunter.io/developer/1881459297) | [松 颜](https://appshunter.io/developer/6775418183) |

## What reviewers say

### PDF Book Read

[App page](https://appshunter.io/ios/app/pdf-book-read/id6760929497)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Premium | $1.99 | per year |
| Lifetime Premium | $2.99 | one-time |


### ClaviSay

[App page](https://appshunter.io/ios/app/clavisay-language-practice/id6776266342)

Improve your English by reading real-world content and practicing with a personalized AI agent. Save new words and phrases, then engage in focused AI-powered exercises based on your learning history. Receive AI feedback to enhance your own English expressions.

**Highlights:** Read English articles with AI assistance, Save vocabulary and expressions, Personalized AI practice sessions, AI feedback on English expressions, Review mistakes and learning items, Build a personal learning memory

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PDF Book Read free?

PDF Book Read is free to download, with in-app purchases available.

### Is ClaviSay free?

ClaviSay is free to download, with no in-app purchases.

### Do PDF Book Read or ClaviSay have ads?

Neither PDF Book Read nor ClaviSay shows ads.

### Which is updated more often, PDF Book Read or ClaviSay?

PDF Book Read ships an update every 3 weeks, and ClaviSay weekly. Most recently, PDF Book Read was updated on October 18, 2026 and ClaviSay on October 5, 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.*