# FOSS eBooks vs CK

The clearest difference is rating: FOSS eBooks at 2.2 against CK's 1.4. FOSS eBooks also leads on review sentiment (40% vs 0%) and update cadence (every 2 months vs every 9 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

FOSS eBooks holds the better App Store score, 2.2 against 1.4. Both are backed by a comparable volume of ratings — 57 and 19 respectively. Written reviews point the same way: 40% of FOSS eBooks's written reviews are positive against 0% of CK's.

FOSS eBooks ships an update every 2 months, CK every 9 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | FOSS eBooks | CK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.2 (57 ratings)](https://appshunter.io/ios/app/foss-ebooks/id1081851908/reviews)** | [1.4 (19 ratings)](https://appshunter.io/ios/app/ck-auth/id1342083838/reviews) |
| Number of ratings | **57** | 19 |
| Positive reviews | **40.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Monetization | Free | Free |
| Size | 139 MB | 2 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hurix Systems Pvt. Ltd.](https://appshunter.io/developer/429900405) | [ContentKeeper Technologies](https://appshunter.io/developer/1342083837) |

## What reviewers say

### FOSS eBooks

[App page](https://appshunter.io/ios/app/foss-ebooks/id1081851908)

Access and read your FOSS educational eBooks offline with this interactive reader. Enjoy features like portrait/landscape viewing, thumbnail navigation, and listen to audio narration on supported titles.

**Highlights:** Offline eBook access, Portrait and landscape view, Thumbnail navigation, Audio narration on select products, Interactive learning

**In-app purchases:** none


### CK

[App page](https://appshunter.io/ios/app/ck-auth/id1342083838)

This app offers a secure and filtered internet browsing experience for iOS users, ensuring CIPA compliance for educational institutions. It provides granular, identity-based reporting and policy-driven web access control, whether users are on-premises or traveling globally.

**Highlights:** Secure internet browsing, Identity-based reporting, Policy-based filtering, CIPA compliance, Global web access control, MDM deployment

**In-app purchases:** none


## Frequently asked questions

### Is FOSS eBooks free?

FOSS eBooks is free to download, with no in-app purchases.

### Is CK free?

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

### Which has better reviews, FOSS eBooks or CK?

FOSS eBooks is rated higher. FOSS eBooks averages 2.2 out of 5 from 57 ratings, while CK averages 1.4 from 19 ratings.

### Do FOSS eBooks or CK have ads?

Neither FOSS eBooks nor CK shows ads.

### Which is updated more often, FOSS eBooks or CK?

FOSS eBooks ships an update every 2 months, and CK every 9 months. Most recently, FOSS eBooks was updated on November 2, 2026 and CK on November 2, 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.*