# QUBE(큐브) vs 개념원리ai

The clearest difference is rating: QUBE(큐브) at 5.0 against 개념원리ai's 4.2. 개념원리ai's advantage is review sentiment (95% vs 58%) and in-app purchases (none vs 2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. QUBE(큐브) sells 2 one-off in-app purchases. 개념원리ai asks for nothing beyond the download.

QUBE(큐브) holds the better App Store score, 5.0 against 4.2. 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 complicate that: 58% of QUBE(큐브)'s written reviews are positive against 95% of 개념원리ai's, so the app with the better star average is not the one people write more warmly about.

QUBE(큐브) ships an update every 3 weeks, 개념원리ai fortnightly. The most recent releases landed on September 21, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | QUBE(큐브) | 개념원리ai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/qube/id1377555791/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/ai/id6467370741/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | 58.5% of reviews | **95.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 42 MB | 153 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MegaStudyEdu](https://appshunter.io/developer/1050903129) | [(주)개념원리](https://appshunter.io/developer/1589346598) |

## What reviewers say

### QUBE(큐브)

[App page](https://appshunter.io/ios/app/qube/id1377555791)

Get instant help with homework from verified university students. Snap a photo of any question for quick solutions or ask detailed questions for personalized guidance. Access study tips and college admissions advice.

**Highlights:** Photo search for math and science problems, Ask questions to university student tutors, Get step-by-step solutions, 1:1 online tutoring sessions, Study tips and college admissions advice, 24/7 question and answer service

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1Q | $0.99 | one-time |
| 2Q | $0.99 | one-time |


### 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


## Frequently asked questions

### Is QUBE(큐브) free?

QUBE(큐브) is free to download, with in-app purchases available.

### Is 개념원리ai free?

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

### Which has better reviews, QUBE(큐브) or 개념원리ai?

QUBE(큐브) is rated higher. QUBE(큐브) averages 5.0 out of 5 from 1 ratings, while 개념원리ai averages 4.2 from 5 ratings.

### Do QUBE(큐브) or 개념원리ai have ads?

Neither QUBE(큐브) nor 개념원리ai shows ads.

### Which is updated more often, QUBE(큐브) or 개념원리ai?

QUBE(큐브) ships an update every 3 weeks, and 개념원리ai fortnightly. Most recently, QUBE(큐브) was updated on September 21, 2026 and 개념원리ai on September 25, 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.*