# 공주대학교 도서관 vs retention+

The clearest difference is in-app purchases: 공주대학교 도서관 at none against retention+'s 10. 공주대학교 도서관 also leads on iOS requirement (12.3 vs 17.6). retention+'s advantage is update cadence (every 4 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. retention+ sells 10 in-app purchases, starting at $0.99 per month. 공주대학교 도서관 asks for nothing beyond the download.

공주대학교 도서관 ships an update every 2 months, retention+ every 4 days. The most recent releases landed on September 19, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 공주대학교 도서관 | retention+ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 5 MB | 23 MB |
| Requires iOS | **12.3** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [INEK corp.](https://appshunter.io/developer/494214129) | [WONYEONG NA](https://appshunter.io/developer/6783655961) |

## What reviewers say

### 공주대학교 도서관

[App page](https://appshunter.io/ios/app/id1173445402)

Access library information, view announcements, and manage your account. Request new materials, check loan history, and access digital resources like e-books and databases. Apply for various library services directly through the app.

**Highlights:** Library information and hours, Announcements and notices, Material purchase requests, Loan history and personal notices, Access to digital resources, Library service applications

**Features:** Vision Pro support

**In-app purchases:** none


### retention+

[App page](https://appshunter.io/ios/app/retention-plus/id6783655959)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| retention+ 월간 구독 | $0.99 | per month |
| retention+ 연간 구독 | $9.99 | per year |
| Developer Support I | $0.49 | one-time |
| Developer Support II | $1.99 | one-time |
| Developer Support III | $2.99 | one-time |
| Developer Support IV | $5.99 | one-time |
| Developer Support V | $9.99 | one-time |
| Developer Support VI | $17.99 | one-time |
| Developer Support VII | $34.99 | one-time |
| Developer Support VIII | $69.99 | one-time |


## Frequently asked questions

### Is 공주대학교 도서관 free?

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

### Is retention+ free?

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

### Do 공주대학교 도서관 or retention+ have ads?

Neither 공주대학교 도서관 nor retention+ shows ads.

### Which is updated more often, 공주대학교 도서관 or retention+?

공주대학교 도서관 ships an update every 2 months, and retention+ every 4 days. Most recently, 공주대학교 도서관 was updated on September 19, 2026 and retention+ on October 25, 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.*