# 성북u vs 윌라

The clearest difference is rating: 윌라 at 4.2 against 성북u's 3.0. 윌라 also leads on review sentiment (67% vs 33%) and update cadence (every 4 days vs every 3 weeks). 성북u's advantage is in-app purchases (none vs 10). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 윌라 sells 10 in-app purchases, starting at $8.49 per month. 성북u asks for nothing beyond the download.

윌라 holds the better App Store score, 4.2 against 3.0. That said, the two scores are not equally well evidenced: 윌라 has 171 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 33% of 성북u's written reviews are positive against 67% of 윌라's.

성북u ships an update every 3 weeks, 윌라 every 4 days. The most recent releases landed on November 10, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | 성북u | 윌라 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/u/id472920010/reviews) | **[4.2 (171 ratings)](https://appshunter.io/ios/app/id1250319483/reviews)** |
| Number of ratings | 2 | **171** |
| Positive reviews | 33.3% of reviews | **67.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 19 MB | 155 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [(주)이씨오](https://appshunter.io/developer/371073988) | [INFLUENTIAL Inc.](https://appshunter.io/developer/1250319482) |

## What reviewers say

### 성북u

[App page](https://appshunter.io/ios/app/u/id472920010)

This application unifies multiple libraries in the Seongbuk district, offering integrated search for their collections. Members can access library services, reserve books, manage loans, and view their borrowing history.

**Highlights:** Integrated library search, Book reservations and cancellations, Loan management, Borrowing history, Unified access to multiple libraries

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

**In-app purchases:** none


### 윌라

[App page](https://appshunter.io/ios/app/id1250319483)

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 윌라 오디오북 멤버십(판매중지) | $8.49 | per month |
| 클래스 무제한(판매중지) | $8.49 | per month |
| 오디오북 무제한(판매중지) | $8.49 | per month |
| 윌라 베이직 멤버십 | $9.99 | per month |
| 윌라 통합 멤버십(월간) | $9.99 | per month |
| 윌라 통합 멤버십(월간) | $9.99 | per month |
| 윌라 통합 멤버십(월간) | $10.49 | per month |
| 윌라 통합 멤버십(월간) | $10.99 | per month |
| 윌라 통합 멤버십(월간) | $10.99 | per month |
| 윌라 통합 멤버십(월간) | $10.99 | per month |


## Frequently asked questions

### Is 성북u free?

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

### Is 윌라 free?

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

### Which has better reviews, 성북u or 윌라?

윌라 is rated higher. 성북u averages 3.0 out of 5 from 2 ratings, while 윌라 averages 4.2 from 171 ratings.

### Do 성북u or 윌라 have ads?

Neither 성북u nor 윌라 shows ads.

### Which is updated more often, 성북u or 윌라?

성북u ships an update every 3 weeks, and 윌라 every 4 days. Most recently, 성북u was updated on November 10, 2026 and 윌라 on November 11, 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.*