# 수학대왕 vs 레서

The clearest difference is ads: 레서 at none against 수학대왕's shown. 레서 also leads on update cadence (every 8 days vs monthly) and monetization model (free vs ad-supported). 수학대왕's advantage is rating (4.4 vs 4.0) and ratings volume (36 vs 1). On price, review sentiment, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

수학대왕 holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: 수학대왕 has 36 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 88% of 수학대왕's written reviews are positive against 95% of 레서's, so the app with the better star average is not the one people write more warmly about.

수학대왕 ships an update monthly, 레서 every 8 days. The most recent releases landed on September 24, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | 수학대왕 | 레서 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (36 ratings)](https://appshunter.io/ios/app/ai/id1501165233/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/ai/id1619729664/reviews) |
| Number of ratings | **36** | 1 |
| Positive reviews | 87.5% of reviews | **95.2% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 8 days** |
| Monetization | Ad-supported | **Free** |
| Size | 86 MB | 251 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Turing Co.,Ltd.](https://appshunter.io/developer/1501165232) | [Artificial Society Inc.](https://appshunter.io/developer/1627456359) |

## What reviewers say

### 수학대왕

[App page](https://appshunter.io/ios/app/ai/id1501165233)

This app offers a comprehensive solution for math studies, providing AI-driven analysis, practice problems, and concise video lectures. It helps users improve their scores by identifying weak areas and offering tailored learning paths. Features include personalized problem sets, original content, and progress tracking.

**Highlights:** AI-driven skill analysis, Personalized problem sets, Original practice problems, Short, efficient video lectures, Progress tracking and reports, Daily scholarship system

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 레서

[App page](https://appshunter.io/ios/app/ai/id1619729664)

This app helps students from elementary to high school improve their Korean language skills. It offers AI-powered personalized learning, a vast library of curriculum-based content, and tools for reading, writing, and comprehension. Features include daily learning, monthly reading comprehension tests, and AI-powered feedback for written assignments.

**Highlights:** AI personalized learning curriculum, 30,000+ curriculum-based content, Daily Korean language practice, Monthly reading comprehension tests, AI writing feedback and scoring, AI eye-tracking for reading habits

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 수학대왕 free?

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

### Is 레서 free?

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

### Which has better reviews, 수학대왕 or 레서?

수학대왕 is rated higher. 수학대왕 averages 4.4 out of 5 from 36 ratings, while 레서 averages 4.0 from 1 ratings.

### Do 수학대왕 or 레서 have ads?

수학대왕 shows ads; 레서 does not.

### Which is updated more often, 수학대왕 or 레서?

수학대왕 ships an update monthly, and 레서 every 8 days. Most recently, 수학대왕 was updated on September 24, 2026 and 레서 on August 12, 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.*