# 서울도서관공식앱 vs 런즈

The clearest difference is review sentiment: 런즈 at 100% against 서울도서관공식앱's 11%. 런즈 also leads on rating (4.6 vs 1.4) and update cadence (every 5 days vs every 2 months). 서울도서관공식앱's advantage is device support (3 vs 1). On price, ratings volume, 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.

런즈 holds the better App Store score, 4.6 against 1.4. Both are backed by a comparable volume of ratings — 13 and 7 respectively. Written reviews point the same way: 11% of 서울도서관공식앱's written reviews are positive against 100% of 런즈's.

서울도서관공식앱 ships an update every 2 months, 런즈 every 5 days. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | 서울도서관공식앱 | 런즈 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.4 (13 ratings)](https://appshunter.io/ios/app/id777428688/reviews) | **[4.6 (7 ratings)](https://appshunter.io/ios/app/id6450406644/reviews)** |
| Number of ratings | **13** | 7 |
| Positive reviews | 10.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | — | Free |
| Size | 10 MB | 90 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Seoul Metropolitan Government](https://appshunter.io/developer/444447999) | [Mingle Lab](https://appshunter.io/developer/1653738923) |

## What reviewers say

### 서울도서관공식앱

[App page](https://appshunter.io/ios/app/id777428688)

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

**In-app purchases:** none


### 런즈

[App page](https://appshunter.io/ios/app/id6450406644)

Find the perfect after-school academy for your child with this app. Discover local academies, view detailed information like tuition and shuttle availability, and read honest reviews from other parents. Manage your child's schedule and connect with a community for educational discussions.

**Highlights:** Custom academy search, Local community lounge, Comprehensive academy information, Parent reviews and ratings, Shared family schedule planner, In-app inquiries, Save favorite academies

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 서울도서관공식앱 free?

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

### Is 런즈 free?

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

### Which has better reviews, 서울도서관공식앱 or 런즈?

런즈 is rated higher. 서울도서관공식앱 averages 1.4 out of 5 from 13 ratings, while 런즈 averages 4.6 from 7 ratings.

### Do 서울도서관공식앱 or 런즈 have ads?

Neither 서울도서관공식앱 nor 런즈 shows ads.

### Which is updated more often, 서울도서관공식앱 or 런즈?

서울도서관공식앱 ships an update every 2 months, and 런즈 every 5 days. Most recently, 서울도서관공식앱 was updated on October 21, 2026 and 런즈 on October 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*