# 해커스 ONE vs 서울대학교 모바일 중앙도서관

The clearest difference is rating: 해커스 ONE at 3.5 against 서울대학교 모바일 중앙도서관's 2.3. 해커스 ONE also leads on ratings volume (10 vs 3). 서울대학교 모바일 중앙도서관's advantage is in-app purchases (none vs 4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 해커스 ONE sells 4 one-off in-app purchases. 서울대학교 모바일 중앙도서관 asks for nothing beyond the download.

해커스 ONE holds the better App Store score, 3.5 against 2.3. Both are backed by a comparable volume of ratings — 10 and 3 respectively.

해커스 ONE ships an update fortnightly, 서울대학교 모바일 중앙도서관 every 3 weeks. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 해커스 ONE | 서울대학교 모바일 중앙도서관 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (10 ratings)](https://appshunter.io/ios/app/one/id1538534916/reviews)** | [2.3 (3 ratings)](https://appshunter.io/ios/app/id1672893597/reviews) |
| Number of ratings | **10** | 3 |
| Positive reviews | 62.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 192 MB | 76 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Champ Study Institute](https://appshunter.io/developer/466747997) | [서울대학교 중앙도서관](https://appshunter.io/developer/1672893599) |

## What reviewers say

### 해커스 ONE

[App page](https://appshunter.io/ios/app/one/id1538534916)

Access a wide range of online courses from Hackers in one app. Organize your lectures, utilize free learning materials, and connect with other students. Enjoy a personalized learning experience with features like note-taking and Q&A with instructors.

**Highlights:** Browse courses by interest, Access free lectures and study materials, Organize and play your lectures, Take notes and ask instructors questions, View course reviews and share learning info, Receive news and updates

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 왕초보  그림으로 배우는 일본어 회화 | $2.99 | one-time |
| 원어민이 알려주는 리얼 여행영어 - 해외 현지 촬영 | $2.99 | one-time |
| 이유리의 누구나 쉽게 배우는 여행 중국어 (전반부) | $2.99 | one-time |
| 제2외국어 대표강의 - 9강좌 종합 | $30.99 | one-time |


### 서울대학교 모바일 중앙도서관

[App page](https://appshunter.io/ios/app/id1672893597)

This app provides access to library services for Seoul National University members and library patrons. It allows for digital library cards, seat and facility reservations, academic resource searching, and viewing loan statuses. Stay updated with library news and announcements.

**Highlights:** Digital library card for gate and book authentication, Seat and facility reservation, Academic resource search, Loan and overdue fee management, Library news feed

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

**In-app purchases:** none


## Frequently asked questions

### Is 해커스 ONE free?

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

### Is 서울대학교 모바일 중앙도서관 free?

서울대학교 모바일 중앙도서관 is free to download, with no in-app purchases.

### Which has better reviews, 해커스 ONE or 서울대학교 모바일 중앙도서관?

해커스 ONE is rated higher. 해커스 ONE averages 3.5 out of 5 from 10 ratings, while 서울대학교 모바일 중앙도서관 averages 2.3 from 3 ratings.

### Do 해커스 ONE or 서울대학교 모바일 중앙도서관 have ads?

Neither 해커스 ONE nor 서울대학교 모바일 중앙도서관 shows ads.

### Which is updated more often, 해커스 ONE or 서울대학교 모바일 중앙도서관?

해커스 ONE ships an update fortnightly, and 서울대학교 모바일 중앙도서관 every 3 weeks. Most recently, 해커스 ONE was updated on October 30, 2026 and 서울대학교 모바일 중앙도서관 on October 24, 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.*