# 개념원리ai vs 워드마스터 통합 학습앱

The clearest difference is rating: 개념원리ai at 4.2 against 워드마스터 통합 학습앱's 3.0. 개념원리ai also leads on in-app purchases (none vs 19) and review sentiment (95% vs 80%). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 워드마스터 통합 학습앱 sells 19 one-off in-app purchases. 개념원리ai asks for nothing beyond the download.

개념원리ai holds the better App Store score, 4.2 against 3.0. That said, the two scores are not equally well evidenced: 개념원리ai has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 95% of 개념원리ai's written reviews are positive against 80% of 워드마스터 통합 학습앱's.

개념원리ai ships an update fortnightly, 워드마스터 통합 학습앱 every 3 weeks. The most recent releases landed on September 25, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | 개념원리ai | 워드마스터 통합 학습앱 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/ai/id6467370741/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/id6747540936/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | **95.1% of reviews** | 80.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 153 MB | 74 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [(주)개념원리](https://appshunter.io/developer/1589346598) | [Etoos Education](https://appshunter.io/developer/403650801) |

## What reviewers say

### 개념원리ai

[App page](https://appshunter.io/ios/app/ai/id6467370741)

This app combines a popular math textbook with AI to offer personalized learning. It provides free assessments with detailed explanations, allows users to create custom problem notes, and features a ranking system for friendly competition. Prepare for exams with AI-predicted questions and access a vast problem bank for all middle and high school levels.

**Highlights:** Personalized assessments with free detailed explanations, Customizable problem notes for focused review, AI-predicted exam questions based on school and curriculum, Extensive problem bank for all grades, Interactive ranking system and missions for motivation, Study groups and Q&A for collaborative learning

**In-app purchases:** none


### 워드마스터 통합 학습앱

[App page](https://appshunter.io/ios/app/id6747540936)

This app offers a comprehensive vocabulary learning experience for students, covering all Word Master series for middle and high school. It features smart word memorization tools like word cards, flashcards, and various test types to enhance learning efficiency. The app also includes audio modes for listening practice and personalized content recommendations based on skill level.

**Highlights:** All Word Master series included, Efficient word card learning with 'Yes I Know' method, Customizable word lists for difficult words, Four types of vocabulary tests, Audio mode for listening and memorization, Personalized content recommendations, Sync learning history across devices

**In-app purchases (19)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 워드마스터 초등 COMPLETE | $0.99 | one-time |
| 워드마스터 초등 풀 패키지 2종 | $1.99 | one-time |
| 워드마스터 중등 BASIC(26개정) | $2.99 | one-time |
| 워드마스터 중등 실력(26개정) | $2.99 | one-time |
| 워드마스터 중등 고난도(26개정) | $2.99 | one-time |
| 워드마스터 중등 실력(22개정) | $3.99 | one-time |
| 워드마스터 하이스트 | $4.99 | one-time |
| 워드마스터 고등 BASIC(23개정) | $4.99 | one-time |
| 워드마스터 수능 2000(22개정) | $4.99 | one-time |
| 워드마스터 EBS 파이널 1200(20개정) | $4.99 | one-time |
| 워드마스터 고등 숙어 1000 | $4.99 | one-time |
| 워드마스터 고등 입문 패키지 2종(23개정) | $4.99 | one-time |
| 워드마스터 중등 실력 (26개정) | $5.99 | one-time |
| 워드마스터 중등 고난도 (26개정) | $5.99 | one-time |
| 워드마스터 내신+수능 대비 패키지 2종(25개정) | $6.99 | one-time |
| 워드마스터 중등 풀 패키지 3종(22개정) | $7.99 | one-time |
| 워드마스터 고등 필수 패키지 3종(25개정) | $8.99 | one-time |
| 워드마스터 고등 고난도 패키지 3종(25개정) | $9.99 | one-time |
| 워드마스터 고등 풀 패키지 5종(25개정) | $14.99 | one-time |


## Frequently asked questions

### Is 개념원리ai free?

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

### Is 워드마스터 통합 학습앱 free?

워드마스터 통합 학습앱 is free to download, with in-app purchases available.

### Which has better reviews, 개념원리ai or 워드마스터 통합 학습앱?

개념원리ai is rated higher. 개념원리ai averages 4.2 out of 5 from 5 ratings, while 워드마스터 통합 학습앱 averages 3.0 from 1 ratings.

### Do 개념원리ai or 워드마스터 통합 학습앱 have ads?

Neither 개념원리ai nor 워드마스터 통합 학습앱 shows ads.

### Which is updated more often, 개념원리ai or 워드마스터 통합 학습앱?

개념원리ai ships an update fortnightly, and 워드마스터 통합 학습앱 every 3 weeks. Most recently, 개념원리ai was updated on September 25, 2026 and 워드마스터 통합 학습앱 on September 22, 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.*