# CU vs PTTEP E

The clearest difference is in-app purchases: PTTEP E at none against CU's 10. CU's advantage is iOS requirement (11.0 vs 14.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. CU sells 10 one-off in-app purchases. PTTEP E asks for nothing beyond the download.

CU ships an update every 6 months, PTTEP E every 3 months. Both last shipped on November 1, 2026.

## The numbers

| Metric | CU | PTTEP E |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (4 ratings)](https://appshunter.io/ios/app/cu-ebook-store/id537037074/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 93.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Size | 119 MB | 25 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 9+ |
| Developer | [MEB Corporation Public Company Limited](https://appshunter.io/developer/436964329) | [BOOKDOSE COMPANY LIMITED](https://appshunter.io/developer/459445000) |

## What reviewers say

### CU

[App page](https://appshunter.io/ios/app/cu-ebook-store/id537037074)

Access a digital library of academic books and magazines from leading publishers. Read, annotate, and manage your downloaded content with a user-friendly reader designed for comfort and convenience.

**Highlights:** Browse and search academic books, Download and read e-books, Adjustable text size and fonts, Night mode and brightness control, Take notes and draw on pages, Bookmark and resume reading, Review and rate books

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| หนังสือราคา 1.99 USD | $1.99 | one-time |
| เข็มทิศชีวิต II | $2.99 | one-time |
| หนังสือราคา 2.99 USD | $2.99 | one-time |
| หนังสือราคา 3.99 USD | $3.99 | one-time |
| 100 WAYS TO SAY IN ENGLISH | $4.99 | one-time |
| หนังสือราคา 4.99 USD | $4.99 | one-time |
| หนังสือราคา 5.99 USD | $5.99 | one-time |
| หนังสือราคา 6.99 USD | $6.99 | one-time |
| หนังสือราคา 7.99 USD | $7.99 | one-time |
| หนังสือราคา 8.99 USD | $8.99 | one-time |


### PTTEP E

[App page](https://appshunter.io/ios/app/pttep-e-library/id892711615)

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

**In-app purchases:** none


## Frequently asked questions

### Is CU free?

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

### Is PTTEP E free?

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

### Do CU or PTTEP E have ads?

Neither CU nor PTTEP E shows ads.

### Which is updated more often, CU or PTTEP E?

CU ships an update every 6 months, and PTTEP E every 3 months. Most recently, CU was updated on November 1, 2026 and PTTEP E on November 1, 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.*