# 암기고래 vs 해커스 ONE

The clearest difference is rating: 암기고래 at 4.7 against 해커스 ONE's 3.5. 암기고래 also leads on review sentiment (88% vs 63%) and ratings volume (86 vs 10). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 암기고래 sells 10 one-off in-app purchases and 해커스 ONE sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

암기고래 holds the better App Store score, 4.7 against 3.5. That said, the two scores are not equally well evidenced: 암기고래 has 86 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 88% of 암기고래's written reviews are positive against 63% of 해커스 ONE's.

암기고래 ships an update every 2 weeks, 해커스 ONE fortnightly. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | 암기고래 | 해커스 ONE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (86 ratings)](https://appshunter.io/ios/app/id1071024844/reviews)** | [3.5 (10 ratings)](https://appshunter.io/ios/app/one/id1538534916/reviews) |
| Number of ratings | **86** | 10 |
| Positive reviews | **88.3% of reviews** | 62.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 145 MB | 192 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [welearnedu](https://appshunter.io/developer/1071024843) | [Champ Study Institute](https://appshunter.io/developer/466747997) |

## What reviewers say

### 암기고래

[App page](https://appshunter.io/ios/app/id1071024844)

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 암기고래 1개월 구독권 라이트 | $11.99 | one-time |
| 시원스쿨 스페인어 | $47.99 | one-time |
| 암기고래 1년 구독권 | $49.99 | one-time |
| 시원스쿨 오픽 프리패스 | $54.99 | one-time |
| 시원스쿨 텝스 프리패스 | $79.99 | one-time |
| 짠내영어 1년 프리패스 | $94.99 | one-time |
| 시원스쿨 일본어 1년 프리패스 | $99.99 | one-time |
| 시원스쿨 1년 프리패스 | $99.99 | one-time |
| 시원스쿨 2019 기초영어 1년 프리패스 | $99.99 | one-time |
| 시원스쿨 기적의 영어탈출기 100 | $99.99 | one-time |

**What reviewers like**

- 💰 Excellent free content
- 🎧 Audio explanations for words
- 🎶 Engaging music with vocabulary
- 📚 Wide range of languages
- 🎯 Customizable word lists

**What reviewers complain about**

- 🐛 Spelling test errors
- 📉 Difficulty levels too easy for advanced users
- 💻 Excel file upload issues
- 📱 iOS specific bugs (sound in silent mode)
- 🤔 Difficulty levels not matching expectations

**Reported bugs**

- Spelling test incorrect feedback
- Sound plays in silent mode on iPhone
- App crashes when clicking bookmark
- App does not execute on some devices
- Account linking/sign-up connection error

**Requested features**

- More difficult vocabulary for advanced learners
- Easier method for adding custom words
- Ability to upload from device directly
- Add subjective spelling tests (writing definitions)
- Multiple favorite word lists


### 해커스 ONE

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

Access a wide range of online courses from various fields, including language tests, civil service exams, and professional certifications. Enjoy convenient features like organized course lists, free lectures, and interactive learning tools. Stay updated with the latest educational news and share information with fellow learners.

**Highlights:** Organized course catalog by interest, Free lectures and study materials, Personalized 'My Courses' list, Note-taking and Q&A with instructors, Content sharing and community board, Access to all online lectures in one app

**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 |


## Frequently asked questions

### Is 암기고래 free?

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

### Is 해커스 ONE free?

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

### Which has better reviews, 암기고래 or 해커스 ONE?

암기고래 is rated higher. 암기고래 averages 4.7 out of 5 from 86 ratings, while 해커스 ONE averages 3.5 from 10 ratings.

### Do 암기고래 or 해커스 ONE have ads?

Neither 암기고래 nor 해커스 ONE shows ads.

### Which is updated more often, 암기고래 or 해커스 ONE?

암기고래 ships an update every 2 weeks, and 해커스 ONE fortnightly. Most recently, 암기고래 was updated on November 6, 2026 and 해커스 ONE on November 7, 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.*