# COJ Library vs DOPA Library

The clearest difference is iOS requirement: COJ Library at 10.0 against DOPA Library's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

COJ Library ships an update fortnightly, DOPA Library monthly. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | COJ Library | DOPA Library |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | — | Free |
| Size | 30 MB | 23 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Loxley Orbit Public Company Limited](https://appshunter.io/developer/950919208) | [BOOKDOSE COMPANY LIMITED](https://appshunter.io/developer/459445000) |

## What reviewers say

### COJ Library

[App page](https://appshunter.io/ios/app/coj-library/id6447178622)

**In-app purchases:** none


### DOPA Library

[App page](https://appshunter.io/ios/app/dopa-library/id6695739958)

Access a vast digital library with a wide range of resources including books, journals, e-books, and multimedia content. This application provides a platform for research and learning, offering both internal and external media for users.

**Highlights:** Digital library access, Books and e-books, Journals and e-journals, Multimedia content, Research and learning resources, Internal and external media

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is COJ Library free?

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

### Is DOPA Library free?

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

### Do COJ Library or DOPA Library have ads?

Neither COJ Library nor DOPA Library shows ads.

### Which is updated more often, COJ Library or DOPA Library?

COJ Library ships an update fortnightly, and DOPA Library monthly. Most recently, COJ Library was updated on October 16, 2026 and DOPA Library on October 5, 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.*