# KAIST Library vs 해커스보카

The clearest difference is in-app purchases: KAIST Library at none against 해커스보카's 1. 해커스보카's advantage is review sentiment (55% vs 25%) and update cadence (every 3 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 해커스보카 sells 1 one-off in-app purchase. KAIST Library asks for nothing beyond the download.

KAIST Library ships an update every 2 months, 해커스보카 every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | KAIST Library | 해커스보카 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | **54.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 35 MB | 70 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Korea Advanced Institute of Science and Technology](https://appshunter.io/developer/421320802) | [Champ Study Institute](https://appshunter.io/developer/466747997) |

## What reviewers say

### KAIST Library

[App page](https://appshunter.io/ios/app/kaist-library/id1385896213)

Access library services conveniently from your mobile device. Enjoy fast and easy access to resources anytime, anywhere, extending beyond the physical library.

**Highlights:** Mobile library access, Fast and convenient service, Anytime, anywhere access, Enhanced user experience

**In-app purchases:** none


### 해커스보카

[App page](https://appshunter.io/ios/app/sat/id6443891707)

Master English vocabulary for various exams like TOEFL, IELTS, and SAT with engaging games and personalized learning tools. This app offers free vocabulary games and optional paid features for comprehensive word study.

**Highlights:** Vocabulary games for effective memorization, Selectable study days for focused learning, Create and review custom word lists, Access to recommended English learning resources, Paid features for full textbook vocabulary study, Synonym quizzes and example sentence reviews

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 해커스토플보카 365일 이용권 | $9.99 | one-time |


## Frequently asked questions

### Is KAIST Library free?

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

### Is 해커스보카 free?

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

### Do KAIST Library or 해커스보카 have ads?

Neither KAIST Library nor 해커스보카 shows ads.

### Which is updated more often, KAIST Library or 해커스보카?

KAIST Library ships an update every 2 months, and 해커스보카 every 3 weeks. Most recently, KAIST Library was updated on October 24, 2026 and 해커스보카 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.*