# SOOK Library vs CU e

The clearest difference is update cadence: CU e at monthly against SOOK Library's every 3 months. SOOK Library's advantage is iOS requirement (10.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

SOOK Library ships an update every 3 months, CU e monthly. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | SOOK Library | CU e |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/cu-e-library/id1607050195/reviews)** |
| Number of ratings | — | **5** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | — | Free |
| Size | 36 MB | 117 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Thai Health Promotion Foundation (ThaiHealth)](https://appshunter.io/developer/564468347) | [Hytexts Interactive Limited](https://appshunter.io/developer/1289188993) |

## What reviewers say

### SOOK Library

[App page](https://appshunter.io/ios/app/sook-library/id859185098)

**In-app purchases:** none


### CU e

[App page](https://appshunter.io/ios/app/cu-e-library/id1607050195)

Access a vast collection of ebooks from leading publishers through this online library application. Borrow, reserve, and read titles offline with customizable reading modes and font adjustments for a comfortable experience. Sync your progress across devices and take notes directly within the app.

**Highlights:** Access ebooks from leading publishers, Borrow and reserve ebooks, Offline reading support, Customizable text size and font, Cross-device reading sync, Multiple reading modes, Note-taking and bookmarking

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

**In-app purchases:** none


## Frequently asked questions

### Is SOOK Library free?

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

### Is CU e free?

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

### Do SOOK Library or CU e have ads?

Neither SOOK Library nor CU e shows ads.

### Which is updated more often, SOOK Library or CU e?

SOOK Library ships an update every 3 months, and CU e monthly. Most recently, SOOK Library was updated on October 10, 2026 and CU e 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.*