# PocketBook Reader vs Lios Calibre Viewer

PocketBook Reader and Lios Calibre Viewer both sit at 4.5 stars, but that hides the real split: 100% of Lios Calibre Viewer's written reviews are positive against 55% of PocketBook Reader's. Lios Calibre Viewer also leads on in-app purchases (none vs 58) and update cadence (every 5 days vs every 2 months). PocketBook Reader's advantage is price (Free vs $2.99) and ratings volume (10K vs 3). On rating, ads and device support there is nothing between them.

PocketBook Reader is free to download; Lios Calibre Viewer costs $2.99 up front. PocketBook Reader sells 42 one-off in-app purchases. Lios Calibre Viewer asks for nothing beyond the download.

PocketBook Reader holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: PocketBook Reader has 10K ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 55% of PocketBook Reader's written reviews are positive against 100% of Lios Calibre Viewer's, so the app with the better star average is not the one people write more warmly about.

PocketBook Reader ships an update every 2 months, Lios Calibre Viewer every 5 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PocketBook Reader | Lios Calibre Viewer |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.5 (10K ratings)](https://appshunter.io/ios/app/pocketbook-reader/id805488884/reviews)** | [4.3 (3 ratings)](https://appshunter.io/ios/app/lios-calibre-viewer/id6754184384/reviews) |
| Number of ratings | **10K** | 3 |
| Positive reviews | 54.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | **#167** | — |
| Size | 106 MB | 11 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Pocketbook International SA](https://appshunter.io/developer/1536135171) | [Antonio Torres](https://appshunter.io/developer/1799367055) |

## What reviewers say

### PocketBook Reader

[App page](https://appshunter.io/ios/app/pocketbook-reader/id805488884)

**Currently charting:** #167 Top Free · Book (US App Store)

This app is a versatile reader supporting 26 book and audio formats, including EPUB, PDF, and audiobooks. It offers features like PDF reflow, text-to-speech, cloud synchronization, and extensive customization options for a comfortable reading experience.

**Highlights:** Supports 26 book and audio formats, PDF Reflow function, Text-to-speech engine, Cloud synchronization service, Customizable interface and reading settings, Adobe DRM support

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

**In-app purchases (42)**

| Purchase | Price | Billing |
| --- | --- | --- |
| eBook | $0.99 | one-time |
| eBook (class A) | $0.99 | one-time |
| eBook | $1.99 | one-time |
| eBook (class B) | $1.99 | one-time |
| eBook | $2.95 | one-time |
| eBook | $2.99 | one-time |
| eBook (class C) | $2.99 | one-time |
| eBook | $3.99 | one-time |
| eBook: type 4.79 | $3.99 | one-time |
| eBook: type 4.19 | $3.99 | one-time |
| eBook (class D) | $3.99 | one-time |
| eBook (class Alt5) | $4.99 | one-time |
| eBook: type 5.39 | $4.99 | one-time |
| eBook (class F) | $4.99 | one-time |
| eBook: type 5.89 | $4.99 | one-time |
| eBook | $4.99 | one-time |
| eBook: type 5.09 | $4.99 | one-time |
| eBook (class G) | $5.99 | one-time |
| eBook | $5.99 | one-time |
| eBook: type 7.09 | $5.99 | one-time |
| eBook: type 7.19 | $5.99 | one-time |
| eBook: type 8.29 | $6.99 | one-time |
| eBook: type 7.59 | $6.99 | one-time |
| eBook | $7.99 | one-time |
| eBook: type 8.89 | $7.99 | one-time |
| eBook (class J) | $8.99 | one-time |
| eBook | $8.99 | one-time |
| eBook: type 10.9 | $9.90 | one-time |
| eBook | $9.90 | one-time |
| eBook | $9.99 | one-time |
| eBook (class L) | $10.99 | one-time |
| eBook: type 13.9 | $11.90 | one-time |
| eBook | $11.99 | one-time |
| eBook: type 12.99 | $11.99 | one-time |
| eBook | $12.99 | one-time |
| eBook (class N) | $12.99 | one-time |
| eBook (class O) | $13.99 | one-time |
| eBook: type 17.9 | $14.90 | one-time |
| eBook | $14.99 | one-time |
| eBook (class R) | $16.99 | one-time |
| eBook (class T) | $18.99 | one-time |
| eBook (class W) | $21.99 | one-time |

**What reviewers like**

- 👍 Convenient reading experience
- 🚀 Smooth scrolling
- 💡 Customizable settings (font, margin, etc.)
- 🔒 Supports DRM-protected content
- 👍 Intuitive user interface

**What reviewers complain about**

- 🐛 Crashes and freezes
- 🐛 Unreliable cloud sync
- 🐛 Inconsistent page rendering
- 🐛 Buggy text highlighting and annotation
- 🐛 Slow loading times

**Reported bugs**

- Books disappearing from library after login issues
- Inability to open DRM-protected PDFs
- Inconsistent behavior when switching between portrait and landscape modes
- Text-to-speech voice quality issues

**Requested features**

- Ability to organize books into custom folders
- Option to disable quick action zones
- Improved text-to-speech controls (seek, pause, etc.)
- Support for handwritten annotations with Apple Pencil
- Faster page turning and scrolling


### Lios Calibre Viewer

[App page](https://appshunter.io/ios/app/lios-calibre-viewer/id6754184384)

Access and read your entire book collection from your computer on your iPad or iPhone. Organize books by category and download them for offline reading, saving device space. Browse your library quickly with locally stored book names and cover art.

**Highlights:** Stream Calibre library, Download books for offline reading, Organize books by category, Quick library browsing, Save device space

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

**In-app purchases:** none


## Frequently asked questions

### Is PocketBook Reader free?

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

### Is Lios Calibre Viewer free?

Lios Calibre Viewer costs $2.99, with no in-app purchases.

### Which has better reviews, PocketBook Reader or Lios Calibre Viewer?

PocketBook Reader is rated higher. PocketBook Reader averages 4.5 out of 5 from 10K ratings, while Lios Calibre Viewer averages 4.3 from 3 ratings.

### Do PocketBook Reader or Lios Calibre Viewer have ads?

Neither PocketBook Reader nor Lios Calibre Viewer shows ads.

### Which is updated more often, PocketBook Reader or Lios Calibre Viewer?

PocketBook Reader ships an update every 2 months, and Lios Calibre Viewer every 5 days. Most recently, PocketBook Reader was updated on October 28, 2026 and Lios Calibre Viewer on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*