# 다산패스 필기 vs Welding Written

The clearest difference is in-app purchases: Welding Written at none against 다산패스 필기's 24. Welding Written also leads on update cadence (every 3 days vs every 2 weeks). 다산패스 필기's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 다산패스 필기 sells 24 in-app purchases, starting at $9.99 per month. Welding Written asks for nothing beyond the download.

다산패스 필기 ships an update every 2 weeks, Welding Written every 3 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | 다산패스 필기 | Welding Written |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/cbt/id6756396501/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 87.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 47 MB | 66 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [다산에듀](https://appshunter.io/developer/1643377216) | [hyuncheol seo](https://appshunter.io/developer/6797554122) |

## What reviewers say

### 다산패스 필기

[App page](https://appshunter.io/ios/app/cbt/id6756396501)

This app provides a comprehensive platform for practicing past exam questions for various certifications. It offers features like in-app note-taking, automatic scoring, detailed explanations, and mock exams tailored to real test conditions. Efficiently prepare for your exams anytime, anywhere.

**Highlights:** In-app note-taking on questions, Automatic scoring and error review, Bookmark difficult or reviewable questions, Realistic mock exams based on exam weight, Various study modes for weak areas, Covers electrical, fire safety, and other certifications

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

**In-app purchases (24)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 빅데이터분석기사 필기 | $9.99 | per month |
| 공조냉동기계기능사 필기 | $12.99 | per month |
| 전기기능장 필기 | $17.99 | per month |
| 컴퓨터그래픽기능사 필기 | $1.99 | one-time |
| 공조냉동기계기능사 필기 | $1.99 | one-time |
| 빅데이터분석기사 필기 모의고사 | $1.99 | one-time |
| 위험물산업기사 필기 모의고사 | $1.99 | one-time |
| 위험물기능사 필기 모의고사 | $1.99 | one-time |
| 직업상담사2급 필기 모의고사 | $1.99 | one-time |
| 정보처리기사 필기 | $2.99 | one-time |
| 대기환경기사 필기 | $2.99 | one-time |
| 수질환경기사 필기 | $2.99 | one-time |
| 공인중개사 2차 필기 | $2.99 | one-time |
| 공인중개사 1차 필기 | $2.99 | one-time |
| 손해평가사 1차 필기 | $2.99 | one-time |
| 사회복지사 1급 필기 | $2.99 | one-time |
| 산업안전지도사 필기 | $2.99 | one-time |
| 소방설비산업기사(전기분야) 필기 모의고사 | $2.99 | one-time |
| 소방설비기사(기계분야) 필기 모의고사 | $2.99 | one-time |
| 전기직공무원(전기이론) 모의고사 | $2.99 | one-time |
| 소방설비산업기사(기계분야) 필기 모의고사 | $2.99 | one-time |
| 산업안전기사 필기 모의고사 | $2.99 | one-time |
| 산업안전산업기사 필기 모의고사 | $2.99 | one-time |
| 전기직공무원(전기기기) 모의고사 | $2.99 | one-time |


### 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 다산패스 필기 free?

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

### Is Welding Written free?

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

### Do 다산패스 필기 or Welding Written have ads?

Welding Written shows ads; 다산패스 필기 does not.

### Which is updated more often, 다산패스 필기 or Welding Written?

다산패스 필기 ships an update every 2 weeks, and Welding Written every 3 days. Most recently, 다산패스 필기 was updated on October 31, 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.*