# BookFusion vs KyBook 3 Ebook Reader

BookFusion and KyBook 3 Ebook Reader both sit at 4.7 stars, but that hides the real split: 76% of BookFusion's written reviews are positive against 61% of KyBook 3 Ebook Reader's. KyBook 3 Ebook Reader's advantage is ratings volume (4.7K vs 523) and iOS requirement (11.0 vs 15.1). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. BookFusion sells 6 in-app purchases, starting at $1.99 per month and KyBook 3 Ebook Reader sells 4 in-app purchases, starting at $4.49 per 3 months. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for BookFusion against 4.7 for KyBook 3 Ebook Reader. That said, the two scores are not equally well evidenced: KyBook 3 Ebook Reader has 4.7K ratings behind it against 523, so its average is the more settled of the two. Written reviews are what separate them: 76% of BookFusion's written reviews are positive against 61% of KyBook 3 Ebook Reader's.

BookFusion ships an update every 10 days, KyBook 3 Ebook Reader every 5 days. Both last shipped on November 2, 2026.

## The numbers

| Metric | BookFusion | KyBook 3 Ebook Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (523 ratings)](https://appshunter.io/ios/app/bookfusion/id1141834096/reviews)** | [4.7 (4.7K ratings)](https://appshunter.io/ios/app/kybook-3-ebook-reader/id1348198785/reviews) |
| Number of ratings | 523 | **4.7K** |
| Positive reviews | **76.4% of reviews** | 61.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 5 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 158 MB | 53 MB |
| Requires iOS | 15.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [BookFusion](https://appshunter.io/developer/1141834095) | [Konstantin Bukreev](https://appshunter.io/developer/547576207) |

## What reviewers say

### BookFusion

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

Manage, read, and organize your eBooks across all devices with seamless cloud synchronization. Customize your reading experience with extensive settings, highlight notes, and text-to-speech functionality. Integrates with Calibre and supports various file formats.

**Highlights:** Cross-platform eBook reader and manager, Cloud sync for reading progress and eBooks, Customizable reading experience, Highlighting and annotation tools, Text-to-Speech (TTS) functionality, Calibre integration, Support for EPUB, PDF, CBZ/CBR

**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


### KyBook 3 Ebook Reader

[App page](https://appshunter.io/ios/app/kybook-3-ebook-reader/id1348198785)

This app is a versatile e-book reader and cataloger supporting numerous formats like EPUB, MOBI, and PDF. It offers a comfortable reading experience with customizable options, powerful annotation tools, and seamless cloud storage integration. Organize your library with tags, collections, and a handy cataloguer.

**Highlights:** Supports all major e-book formats, OPDS catalog access, Comfortable reading mode with themes, Powerful annotations and summary editor, Handy cataloguer with tagging, Cloud storage integration

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 months subscription | $4.49 | per 3 months |
| Yearly subscription | $14.99 | per year |
| Upgrade to Pro (Discount) | $2.99 | one-time |
| Upgrade to Pro | $4.99 | one-time |

**What reviewers like**

- 🚀 Excellent design, close to no ads
- 🚀 Handles various file formats well
- 👍 Customizable, lots of features
- 👍 Stable and fast
- 👍 Good for reading comics/manga

**What reviewers complain about**

- 🐛 Sync and account issues
- 🐛 Crashes, bugs, and compatibility problems
- 🔍 Confusing interface, hard to use
- 💰 Paid features and subscription model
- 🔍 Missing key features like page turn animation

**Reported bugs**

- Inability to open/read certain file formats
- Sync and account creation issues
- Problems with PDF and image display
- Crashes and compatibility problems
- Duplication of books in library

**Requested features**

- Left alignment option
- Dark mode/OLED black theme
- Improved image handling
- Better support for Chinese language
- Vertical page flip


## Frequently asked questions

### Is BookFusion free?

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

### Is KyBook 3 Ebook Reader free?

KyBook 3 Ebook Reader is free to download, with in-app purchases available.

### Which has better reviews, BookFusion or KyBook 3 Ebook Reader?

BookFusion is rated higher. BookFusion averages 4.7 out of 5 from 523 ratings, while KyBook 3 Ebook Reader averages 4.7 from 4.7K ratings.

### Do BookFusion or KyBook 3 Ebook Reader have ads?

Neither BookFusion nor KyBook 3 Ebook Reader shows ads.

### Which is updated more often, BookFusion or KyBook 3 Ebook Reader?

BookFusion ships an update every 10 days, and KyBook 3 Ebook Reader every 5 days. Most recently, BookFusion was updated on November 2, 2026 and KyBook 3 Ebook Reader on November 2, 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.*