# KyBook vs BookFusion

The clearest difference is rating: BookFusion at 4.7 against KyBook's 4.4. BookFusion also leads on update cadence (every 10 days vs every 3 weeks). KyBook's advantage is iOS requirement (8.0 vs 15.1). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. KyBook sells 2 one-off in-app purchases and BookFusion sells 6 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

BookFusion holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 466 and 521 respectively. Written reviews point the same way: 71% of KyBook's written reviews are positive against 76% of BookFusion's.

KyBook ships an update every 3 weeks, BookFusion every 10 days. Both last shipped on October 26, 2026.

## The numbers

| Metric | KyBook | BookFusion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (466 ratings)](https://appshunter.io/ios/app/kybook-epubfb2pdfdjvu-reader/id673027171/reviews) | **[4.7 (521 ratings)](https://appshunter.io/ios/app/bookfusion/id1141834096/reviews)** |
| Number of ratings | 466 | **521** |
| Positive reviews | 71.2% of reviews | **76.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 50 MB | 158 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Konstantin Bukreev](https://appshunter.io/developer/547576207) | [BookFusion](https://appshunter.io/developer/1141834095) |

## 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


### BookFusion

[App page](https://appshunter.io/ios/app/bookfusion/id1141834096)

Manage, read, and organize your entire eBook collection across all devices with cloud synchronization. Customize your reading experience with extensive settings, highlights, and annotations. Supports various formats and offers text-to-speech functionality.

**Highlights:** Cross-platform eBook reader, Cloud synchronization, Organize with virtual bookshelves, Highlights and annotations, Text-to-Speech (TTS), Send to Kindle, Calibre integration

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Casual Monthly | $1.99 | per month |
| Advanced Monthly | $4.99 | per month |
| Power Monthly | $9.99 | per month |
| Casual Yearly | $18.99 | per year |
| Advanced Yearly | $47.99 | per year |
| Power Yearly | $95.99 | per year |

**What reviewers like**

- 🚀 Excellent cross-platform sync
- 👍 Highly customizable reading experience
- 🚀 Seamless Calibre integration
- 👍 Responsive and helpful developers
- 🚀 Smooth reading experience

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- 💰 Subscription model may be costly for some
- 🔒 Requires account creation to use
- 🐛 Inconsistent page turn behavior
- 🐛 Issues with PDF and fixed-layout EPUB support

**Reported bugs**

- Highlights and notes not always saving properly
- Reading position sometimes resets unexpectedly
- Widget not functioning as expected
- Occasional crashes and freezes
- Issues with importing certain ebook formats

**Requested features**

- Add page numbers instead of just percentages
- Implement a true dark mode
- Improve PDF viewing and annotation capabilities
- Add support for DJVU format
- Provide an option to purchase a lifetime license


## Frequently asked questions

### Is KyBook free?

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

### Is BookFusion free?

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

### Which has better reviews, KyBook or BookFusion?

BookFusion is rated higher. KyBook averages 4.4 out of 5 from 466 ratings, while BookFusion averages 4.7 from 521 ratings.

### Do KyBook or BookFusion have ads?

Neither KyBook nor BookFusion shows ads.

### Which is updated more often, KyBook or BookFusion?

KyBook ships an update every 3 weeks, and BookFusion every 10 days. Most recently, KyBook was updated on October 26, 2026 and BookFusion on October 26, 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.*