# Environmental Engineering Quiz vs APES Prep

The clearest difference is in-app purchases: APES Prep at none against Environmental Engineering Quiz's 6. APES Prep also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Environmental Engineering Quiz | APES Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/environmental-engineering-quiz/id6739960303/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 23 MB | 35 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) | [Small Animal Surgeries Inc](https://appshunter.io/developer/1870736337) |

## 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 |


### APES Prep

[App page](https://appshunter.io/ios/app/apes-prep/id6761887254)

**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 APES Prep free?

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

### Do Environmental Engineering Quiz or APES Prep have ads?

Neither Environmental Engineering Quiz nor APES Prep shows ads.

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

Environmental Engineering Quiz ships an update every 3 months, and APES Prep every 3 months. Most recently, Environmental Engineering Quiz was updated on October 4, 2026 and APES Prep on October 7, 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.*