# Mentors (멘토스북) vs 해커스 그림보카

The clearest difference is review sentiment: 해커스 그림보카 at 87% against Mentors (멘토스북)'s 25%. 해커스 그림보카 also leads on update cadence (every 4 weeks vs every 13 months). Mentors (멘토스북)'s advantage is in-app purchases (none vs 6) and iOS requirement (12.4 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. 해커스 그림보카 sells 6 one-off in-app purchases. Mentors (멘토스북) asks for nothing beyond the download.

Mentors (멘토스북) ships an update every 13 months, 해커스 그림보카 every 4 weeks. The most recent releases landed on October 3, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Mentors (멘토스북) | 해커스 그림보카 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (5 ratings)](https://appshunter.io/ios/app/6/id1378161207/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 25.0% of reviews | **86.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 63 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Hong Suh](https://appshunter.io/developer/1325557308) | [Champ Study Institute](https://appshunter.io/developer/466747997) |

## What reviewers say

### Mentors (멘토스북)

[App page](https://appshunter.io/ios/app/mentors/id1325557309)

Access and download MP3 or video lectures from Mentors books for free. Features include repeat playback, speed control, and background listening to maximize learning effectiveness. Organize your personal study files in dedicated sections.

**Highlights:** Free MP3/video lecture access, Download lectures, Section repeat playback, Playback speed control, Background listening, Personal file organization

**Features:** macOS Compatibility

**In-app purchases:** none


### 해커스 그림보카

[App page](https://appshunter.io/ios/app/6/id1378161207)

Learn English vocabulary effectively with visual aids and native speaker audio. Customize your learning with topic-based and level-specific word lists, and track your progress with smart review features and quizzes. Ideal for all English learners, from beginners to advanced.

**Highlights:** Visual association learning, Native speaker audio pronunciation, Topic and level-based word lists, Personalized vocabulary management, Progress tracking and quizzes, Customizable learning pace

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 초등영어 평생소장 | $11.99 | one-time |
| 왕초보 영단어 | $11.99 | one-time |
| 영어회화 평생소장 | $11.99 | one-time |
| 토익 기초+중급+실전 단어 평생소장 | $11.99 | one-time |
| 공무원 시험 필수 영단어 | $11.99 | one-time |
| 기초영어+초등영어+영어회화 | $17.99 | one-time |


## Frequently asked questions

### Is Mentors (멘토스북) free?

Mentors (멘토스북) is free to download, with no in-app purchases.

### Is 해커스 그림보카 free?

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

### Do Mentors (멘토스북) or 해커스 그림보카 have ads?

Neither Mentors (멘토스북) nor 해커스 그림보카 shows ads.

### Which is updated more often, Mentors (멘토스북) or 해커스 그림보카?

Mentors (멘토스북) ships an update every 13 months, and 해커스 그림보카 every 4 weeks. Most recently, Mentors (멘토스북) was updated on October 3, 2026 and 해커스 그림보카 on October 21, 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.*