# KyBook 3 Ebook Reader vs Readest

KyBook 3 Ebook Reader and Readest both sit at 4.7 stars, but that hides the real split: 84% of Readest'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 195) and update cadence (every 5 days vs fortnightly). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. KyBook 3 Ebook Reader sells 4 in-app purchases, starting at $4.49 per 3 months and Readest sells 9 in-app purchases, starting at $4.99 per month. 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 KyBook 3 Ebook Reader against 4.5 for Readest. That said, the two scores are not equally well evidenced: KyBook 3 Ebook Reader has 4.7K ratings behind it against 195, so its average is the more settled of the two. Written reviews are what separate them: 61% of KyBook 3 Ebook Reader's written reviews are positive against 84% of Readest's.

KyBook 3 Ebook Reader ships an update every 5 days, Readest fortnightly. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | KyBook 3 Ebook Reader | Readest |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (4.7K ratings)](https://appshunter.io/ios/app/kybook-3-ebook-reader/id1348198785/reviews)** | [4.5 (195 ratings)](https://appshunter.io/ios/app/readest-ebook-reader/id6738622779/reviews) |
| Number of ratings | **4.7K** | 195 |
| Positive reviews | 60.9% of reviews | **84.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 53 MB | 58 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 17+ | 4+ |
| Developer | [Konstantin Bukreev](https://appshunter.io/developer/547576207) | [Bilingify LLC](https://appshunter.io/developer/1781524090) |

## What reviewers say

### 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


### Readest

[App page](https://appshunter.io/ios/app/readest-ebook-reader/id6738622779)

This app is a powerful ebook reader designed for deep thinkers and researchers. It offers advanced annotation tools, seamless device syncing, and robust library management with OPDS and Calibre support. Enjoy a distraction-free reading experience with customizable modes and multi-book viewing for enhanced study and analysis.

**Highlights:** OPDS Online Libraries, Calibre Integration, Sync Across Devices, Bookshelf Management, Customizable Reading Modes, Multi-Book View, Advanced Annotations & Highlights

**Features:** Family Sharing, Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscribe to Plus Plan | $4.99 | per month |
| Subscribe to Pro Plan | $9.99 | per month |
| Subscribe to Plus Plan | $49.99 | per year |
| Subscribe to Pro Plan | $99.99 | per year |
| 1 GB | $9.99 | one-time |
| 2 GB | $14.99 | one-time |
| Full Customization | $19.99 | one-time |
| 5 GB | $29.99 | one-time |
| 10 GB | $49.99 | one-time |


## Frequently asked questions

### Is KyBook 3 Ebook Reader free?

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

### Is Readest free?

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

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

KyBook 3 Ebook Reader is rated higher. KyBook 3 Ebook Reader averages 4.7 out of 5 from 4.7K ratings, while Readest averages 4.5 from 195 ratings.

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

Neither KyBook 3 Ebook Reader nor Readest shows ads.

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

KyBook 3 Ebook Reader ships an update every 5 days, and Readest fortnightly. Most recently, KyBook 3 Ebook Reader was updated on October 23, 2026 and Readest on October 22, 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.*