# 성북u vs POLYMall

The clearest difference is update cadence: 성북u at every 3 weeks against POLYMall's every 4 months. 성북u also leads on review sentiment (33% vs 25%). POLYMall's advantage is iOS requirement (11.0 vs 15.6). On price, ads, in-app purchases and monetization model there is nothing between them.

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

성북u ships an update every 3 weeks, POLYMall every 4 months. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | 성북u | POLYMall |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/u/id472920010/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **33.3% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free | Free |
| Size | 19 MB | 11 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [(주)이씨오](https://appshunter.io/developer/371073988) | [Poly Inspiration, Inc.](https://appshunter.io/developer/968089723) |

## What reviewers say

### 성북u

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

This app unifies multiple libraries in the Seongbuk district, offering a single platform to search for and manage library resources. Users can reserve books, check loan status, and access their borrowing history across all integrated branches.

**Highlights:** Integrated library search, Book reservations and cancellations, Loan status and history, Renewal requests, Interlibrary loan applications, User authentication for services

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

**In-app purchases:** none


### POLYMall

[App page](https://appshunter.io/ios/app/polymall/id1327215979)

This app serves as a dedicated shopping portal for educational materials from KOREAPOLYSCHOOL. It allows registered users to easily browse and purchase textbooks and other required items by student, semester, or campus. Users can also group items into sets for convenient ordering and track their purchase history.

**Highlights:** Purchase textbooks by student, Select by semester and campus, Bundle items into sets, Browse by category, View order history, Exclusive for POLY School members

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 성북u free?

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

### Is POLYMall free?

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

### Do 성북u or POLYMall have ads?

Neither 성북u nor POLYMall shows ads.

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

성북u ships an update every 3 weeks, and POLYMall every 4 months. Most recently, 성북u was updated on September 23, 2026 and POLYMall on September 19, 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.*