# Environmental Engineering Quiz vs DUK360

The clearest difference is in-app purchases: DUK360 at none against Environmental Engineering Quiz's 6. DUK360 also leads on update cadence (every 5 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Environmental Engineering Quiz sells 6 in-app purchases, starting at $9.99 per month. DUK360 asks for nothing beyond the download.

Environmental Engineering Quiz ships an update every 3 months, DUK360 every 5 days. The most recent releases landed on October 21, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Environmental Engineering Quiz | DUK360 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/environmental-engineering-quiz/id6739960303/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 23 MB | 62 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) | [Centre for Digital Innovation and Product Development (CDIPD)](https://appshunter.io/developer/1790617169) |

## What reviewers say

### Environmental Engineering Quiz

[App page](https://appshunter.io/ios/app/environmental-engineering-quiz/id6739960303)

Master environmental engineering concepts with engaging quizzes covering wastewater treatment, air pollution, and more. Features timed challenges, practice modes, detailed analytics, and offline access. Ideal for students and professionals seeking to enhance their knowledge.

**Highlights:** Comprehensive topic coverage, Expert-designed challenging questions, Real-time feedback and explanations, Multiple quiz modes, Detailed progress analytics, Offline access

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $9.99 | per month |
| 6 Months | $19.99 | per 6 months |
| 1 Year | $29.99 | per year |
| 1500 | $0.99 | one-time |
| 3500 | $1.99 | one-time |
| 9000 | $3.99 | one-time |


### DUK360

[App page](https://appshunter.io/ios/app/duk360/id6793832300)

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

**In-app purchases:** none


## Frequently asked questions

### Is Environmental Engineering Quiz free?

Environmental Engineering Quiz is free to download, with in-app purchases available.

### Is DUK360 free?

DUK360 is free to download, with no in-app purchases.

### Do Environmental Engineering Quiz or DUK360 have ads?

Neither Environmental Engineering Quiz nor DUK360 shows ads.

### Which is updated more often, Environmental Engineering Quiz or DUK360?

Environmental Engineering Quiz ships an update every 3 months, and DUK360 every 5 days. Most recently, Environmental Engineering Quiz was updated on October 21, 2026 and DUK360 on October 14, 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.*