# FBReader vs KyBook 3 Ebook Reader

The clearest difference is rating: KyBook 3 Ebook Reader at 4.7 against FBReader's 3.7. KyBook 3 Ebook Reader also leads on update cadence (every 5 days vs monthly) and ratings volume (4.6K vs 128). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. FBReader sells 1 one-off in-app purchase 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.

KyBook 3 Ebook Reader holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: KyBook 3 Ebook Reader has 4.6K ratings behind it against 128, so its average is the more settled of the two. Written reviews point the same way: 52% of FBReader's written reviews are positive against 61% of KyBook 3 Ebook Reader's.

FBReader ships an update monthly, KyBook 3 Ebook Reader every 5 days. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | FBReader | KyBook 3 Ebook Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (128 ratings)](https://appshunter.io/ios/app/fbreader-epub-and-fb2-reader/id1067172178/reviews) | **[4.7 (4.6K ratings)](https://appshunter.io/ios/app/kybook-3-ebook-reader/id1348198785/reviews)** |
| Number of ratings | 128 | **4.6K** |
| Positive reviews | 52.5% of reviews | **60.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 22 MB | 53 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [FBReader.ORG Limited](https://appshunter.io/developer/1067172177) | [Konstantin Bukreev](https://appshunter.io/developer/547576207) |

## What reviewers say

### FBReader

[App page](https://appshunter.io/ios/app/fbreader-epub-and-fb2-reader/id1067172178)

A fast and versatile e-book reader supporting multiple formats like ePub, Kindle, and fb2. It offers cloud syncing for reading progress and a customizable interface. Upgrade to unlock unlimited library access and advanced features.

**Highlights:** Supports ePub, Kindle azw3, fb2, RTF, Word, HTML, and text, ePub3 and Readium LCP DRM support, Cloud syncing of library and reading positions, Customizable appearance and behavior options, Direct opening of downloaded files, Free version with library limits

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FBReader Full Edition | $12.99 | one-time |

**What reviewers like**

- 🚀 Fast and smooth reading experience
- 👍 Simple and intuitive interface
- 💡 Customizable font, margin, and layout options
- 🔒 Secure syncing across devices
- 🎨 Retro background textures

**What reviewers complain about**

- 🐛 Occasional crashes and freezes
- 🔧 Lack of advanced organization features (folders, shelves)
- 🚫 No PDF support
- 🔍 Inconsistent search and book discovery
- 🔒 Privacy concerns around data collection

**Reported bugs**

- Syncing issues with Google Drive
- Deletion of books from library
- Formatting problems with large footnotes
- Compatibility issues with newer iOS versions

**Requested features**

- Vertical scrolling mode
- Improved bookmark and annotation tools
- Ability to add/change book covers
- Text-to-speech functionality
- Better library management (read/unread, collections)


### 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 FBReader free?

FBReader 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, FBReader or KyBook 3 Ebook Reader?

KyBook 3 Ebook Reader is rated higher. FBReader averages 3.7 out of 5 from 128 ratings, while KyBook 3 Ebook Reader averages 4.7 from 4.6K ratings.

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

Neither FBReader nor KyBook 3 Ebook Reader shows ads.

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

FBReader ships an update monthly, and KyBook 3 Ebook Reader every 5 days. Most recently, FBReader was updated on October 15, 2026 and KyBook 3 Ebook Reader on October 16, 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.*