# 환경자격증 기출문제 vs 대환기 필기

The clearest difference is in-app purchases: 환경자격증 기출문제 at none against 대환기 필기's 3. 대환기 필기's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 대환기 필기 sells 3 in-app purchases, starting at $1.99 per month. 환경자격증 기출문제 asks for nothing beyond the download.

환경자격증 기출문제 ships an update every 3 months, 대환기 필기 every 3 weeks. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | 환경자격증 기출문제 | 대환기 필기 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 90 MB | 69 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Trutory Co., Ltd.](https://appshunter.io/developer/515679860) | [dasong sim](https://appshunter.io/developer/1883683802) |

## What reviewers say

### 환경자격증 기출문제

[App page](https://appshunter.io/ios/app/id6502931007)

Access past exam questions for various environmental certifications. Choose your exam, practice with different modes, and review your performance. Ads can be removed via subscription.

**Highlights:** Extensive past exam questions, Multiple exam options, Study and practice modes, Answer and incorrect answer notes, Bookmark important questions, Automatic progression option

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

**In-app purchases:** none


### 대환기 필기

[App page](https://appshunter.io/ios/app/id6791810187)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 대환기 필기 프리미엄 월간 | $1.99 | per month |
| 대환기 필기 프리미엄 3개월 | $3.99 | per 3 months |
| 대환기 필기 프리미엄 평생 | $5.99 | one-time |


## Frequently asked questions

### Is 환경자격증 기출문제 free?

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

### Is 대환기 필기 free?

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

### Do 환경자격증 기출문제 or 대환기 필기 have ads?

Both 환경자격증 기출문제 and 대환기 필기 show ads.

### Which is updated more often, 환경자격증 기출문제 or 대환기 필기?

환경자격증 기출문제 ships an update every 3 months, and 대환기 필기 every 3 weeks. Most recently, 환경자격증 기출문제 was updated on October 21, 2026 and 대환기 필기 on October 18, 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.*