# Calibro Reader vs csBooks

The clearest difference is review sentiment: csBooks at 100% against Calibro Reader's 41%. csBooks also leads on update cadence (every 10 days vs every 4 months). Calibro Reader's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. csBooks sells 2 in-app purchases, starting at $6.99 per month. Calibro Reader asks for nothing beyond the download.

Calibro Reader ships an update every 4 months, csBooks every 10 days. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Calibro Reader | csBooks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (4 ratings)](https://appshunter.io/ios/app/calibro-reader/id958205905/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 40.5% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 52 MB | 63 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [LIBRONET BILGI HIZMETLERI VE YAZILIM SANAYI TICARET LTD STI](https://appshunter.io/developer/958205904) | [Ravi Kumar Sharma](https://appshunter.io/developer/1695922963) |

## What reviewers say

### Calibro Reader

[App page](https://appshunter.io/ios/app/calibro-reader/id958205905)

Access your entire e-book library across all your mobile devices with this comprehensive reading platform. Enjoy a new reading style, share favorite quotes on social media, and keep your library with you anywhere.

**Highlights:** Cross-device e-book access, Unified reading platform, Social media quote sharing, Access purchased e-books, Library management

**Features:** macOS Compatibility

**In-app purchases:** none


### csBooks

[App page](https://appshunter.io/ios/app/csbooks-epub-and-pdf-reader/id6477337382)

This app allows users to read and manage ePub and PDF books from their device. It offers features like automatic thumbnail generation, reading progress tracking, customizable text size, and multiple themes for a comfortable reading experience.

**Highlights:** Read ePub and PDF files, Manage book library, Auto book thumbnail generation, Reading progress tracking, Customizable text size and font, 8 stylish reading themes, Cloud storage and desktop sync

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Pro (Monthly) | $6.99 | per month |
| Unlimited Pro (Yearly) | $22.99 | per year |


## Frequently asked questions

### Is Calibro Reader free?

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

### Is csBooks free?

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

### Do Calibro Reader or csBooks have ads?

csBooks shows ads; Calibro Reader does not.

### Which is updated more often, Calibro Reader or csBooks?

Calibro Reader ships an update every 4 months, and csBooks every 10 days. Most recently, Calibro Reader was updated on October 15, 2026 and csBooks on October 12, 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.*