# KyBook vs A FB2 Reader

The clearest difference is rating: KyBook at 4.4 against A FB2 Reader's 3.4. KyBook also leads on ratings volume (464 vs 5). A FB2 Reader's advantage is in-app purchases (none vs 2). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. KyBook sells 2 one-off in-app purchases. A FB2 Reader asks for nothing beyond the download.

KyBook holds the better App Store score, 4.4 against 3.4. That said, the two scores are not equally well evidenced: KyBook has 464 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 71% of KyBook's written reviews are positive against 67% of A FB2 Reader's.

KyBook ships an update every 3 weeks, A FB2 Reader every 2 weeks. The most recent releases landed on September 25, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | KyBook | A FB2 Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (464 ratings)](https://appshunter.io/ios/app/kybook-epubfb2pdfdjvu-reader/id673027171/reviews)** | [3.4 (5 ratings)](https://appshunter.io/ios/app/a-fb2-reader/id964428346/reviews) |
| Number of ratings | **464** | 5 |
| Positive reviews | **71.2% of reviews** | 67.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 50 MB | 18 MB |
| Requires iOS | **8.0** | 9.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Konstantin Bukreev](https://appshunter.io/developer/547576207) | [Yuri Staloverov](https://appshunter.io/developer/845277613) |

## 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


### A FB2 Reader

[App page](https://appshunter.io/ios/app/a-fb2-reader/id964428346)

This free application allows you to read your favorite FB2 format ebooks on your iPad and iPhone. Easily import books from various sources, customize your reading experience with adjustable fonts and color schemes, and navigate your library with ease.

**Highlights:** Read FB2 ebooks, Import from web, iTunes, and cloud drives, Adjustable fonts, spacing, and width, Three color schemes, Easy navigation and page turning, Sort books by various criteria, Book image gallery

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

**In-app purchases:** none


## Frequently asked questions

### Is KyBook free?

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

### Is A FB2 Reader free?

A FB2 Reader is free to download, with no in-app purchases.

### Which has better reviews, KyBook or A FB2 Reader?

KyBook is rated higher. KyBook averages 4.4 out of 5 from 464 ratings, while A FB2 Reader averages 3.4 from 5 ratings.

### Do KyBook or A FB2 Reader have ads?

Neither KyBook nor A FB2 Reader shows ads.

### Which is updated more often, KyBook or A FB2 Reader?

KyBook ships an update every 3 weeks, and A FB2 Reader every 2 weeks. Most recently, KyBook was updated on September 25, 2026 and A FB2 Reader on September 24, 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.*