# KyBook vs DjVu Reader & Viewer

KyBook and DjVu Reader & Viewer both sit at 4.4 stars, but that hides the real split: 71% of KyBook's written reviews are positive against 25% of DjVu Reader & Viewer's. KyBook also leads on update cadence (every 3 weeks vs every 4 months) and ratings volume (464 vs 65). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. KyBook sells 2 one-off in-app purchases and DjVu Reader & Viewer sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.4 for KyBook against 4.3 for DjVu Reader & Viewer. That said, the two scores are not equally well evidenced: KyBook has 464 ratings behind it against 65, so its average is the more settled of the two. Written reviews are what separate them: 71% of KyBook's written reviews are positive against 25% of DjVu Reader & Viewer's.

KyBook ships an update every 3 weeks, DjVu Reader & Viewer every 4 months. The most recent releases landed on September 25, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | KyBook | DjVu Reader & Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (464 ratings)](https://appshunter.io/ios/app/kybook-epubfb2pdfdjvu-reader/id673027171/reviews)** | [4.3 (65 ratings)](https://appshunter.io/ios/app/djvu-reader-and-viewer/id6746808694/reviews) |
| Number of ratings | **464** | 65 |
| Positive reviews | **71.2% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 50 MB | 35 MB |
| Requires iOS | **8.0** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Konstantin Bukreev](https://appshunter.io/developer/547576207) | [Yassir Hrout](https://appshunter.io/developer/1813458400) |

## What reviewers say

### KyBook

[App page](https://appshunter.io/ios/app/kybook-epubfb2pdfdjvu-reader/id673027171)

This app is a versatile e-book reader supporting a wide range of formats including EPUB, PDF, and audiobooks. It offers extensive customization for reading modes, cloud storage integration, and easy book organization. Advanced features like DJVU support and speed reading are available via in-app purchase.

**Highlights:** Supports EPUB, FB2, PDF, DJVU, CBR, CBZ, MP3, M4A, M4B formats, OPDS catalogs and cloud storage integration, Customizable reading mode settings, Book organization and cataloging, Text-to-speech and dictionary support, Speed Reading (RSVP)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Pro Version | $0.99 | one-time |
| Upgrade to Pro Version | $1.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Fast and smooth performance
- 📚 Supports wide range of file formats
- 🔖 Good organization and categorization features
- 🔊 Excellent text-to-speech functionality

**What reviewers complain about**

- 🐛 Syncing issues, especially with Dropbox and Google Drive
- 🔍 Navigation and file management could be improved
- 💰 Paid version required for some key features
- 📢 Intrusive ads in free version
- 🔧 Lack of updates and support from developers

**Reported bugs**

- Crashes after recent iOS updates
- Text-to-speech function not working properly on newer devices
- Inability to delete books from the app
- Inconsistent theme and color customization behavior

**Requested features**

- Add support for more languages
- Improve image handling and layout
- Implement better annotation and highlighting tools
- Provide easier access to main library from subfolders
- Add ability to password protect individual books or folders


### DjVu Reader & Viewer

[App page](https://appshunter.io/ios/app/djvu-reader-and-viewer/id6746808694)

This app offers a modern and elegant way to read DjVu documents on iOS devices. It features high-quality rendering, a smart document tracking system, and a clean interface optimized for technical and academic material.

**Highlights:** High-quality DjVu rendering, Smart document tracking, Clean, intuitive interface, Dark/White mode options, Powerful search capabilities, Optimized performance for large documents

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $2.99 | per 7 days |
| Lifetime Plan | $5.99 | one-time |


## Frequently asked questions

### Is KyBook free?

KyBook is free to download, with in-app purchases available.

### Is DjVu Reader & Viewer free?

DjVu Reader & Viewer is free to download, with in-app purchases available.

### Which has better reviews, KyBook or DjVu Reader & Viewer?

KyBook is rated higher. KyBook averages 4.4 out of 5 from 464 ratings, while DjVu Reader & Viewer averages 4.3 from 65 ratings.

### Do KyBook or DjVu Reader & Viewer have ads?

Neither KyBook nor DjVu Reader & Viewer shows ads.

### Which is updated more often, KyBook or DjVu Reader & Viewer?

KyBook ships an update every 3 weeks, and DjVu Reader & Viewer every 4 months. Most recently, KyBook was updated on September 25, 2026 and DjVu Reader & Viewer on September 23, 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.*