# 수학대왕 vs Welding Written

The clearest difference is update cadence: Welding Written at every 3 days against 수학대왕's monthly. On price, ads, 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 ships an update monthly, Welding Written every 3 days. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 수학대왕 | Welding Written |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (36 ratings)](https://appshunter.io/ios/app/ai/id1501165233/reviews)** | — |
| Number of ratings | **36** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 86 MB | 66 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Turing Co.,Ltd.](https://appshunter.io/developer/1501165232) | [hyuncheol seo](https://appshunter.io/developer/6797554122) |

## 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


### Welding Written

[App page](https://appshunter.io/ios/app/welding-written-passrun/id6812089489)

**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 Welding Written free?

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

### Do 수학대왕 or Welding Written have ads?

Both 수학대왕 and Welding Written show ads.

### Which is updated more often, 수학대왕 or Welding Written?

수학대왕 ships an update monthly, and Welding Written every 3 days. Most recently, 수학대왕 was updated on October 29, 2026 and Welding Written on October 31, 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.*