# Water Treatment Level 3 vs PE2 Exam Pro

Water Treatment Level 3 and PE2 Exam Pro are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Water Treatment Level 3 sells 1 in-app purchase, starting at $7.00 per month and PE2 Exam Pro sells 6 in-app purchases, starting at $39.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Water Treatment Level 3 | PE2 Exam Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Size | 3 MB | 8 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ambitionz Apps](https://appshunter.io/developer/1764753535) | [David Reddick](https://appshunter.io/developer/1885919293) |

## What reviewers say

### Water Treatment Level 3

[App page](https://appshunter.io/ios/app/water-treatment-level-3/id6737529980)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Water Treatment Level 3 | $7.00 | per month |


### PE2 Exam Pro

[App page](https://appshunter.io/ios/app/pe2-exam-pro-power-engineer/id6760730919)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Paper 2A1 — Monthly | $39.99 | per month |
| Paper 2B1 — Monthly | $39.99 | per month |
| Paper 2A2 — Monthly | $39.99 | per month |
| Paper 2A3 — Monthly | $39.99 | per month |
| Paper 2B2 — Monthly | $39.99 | per month |
| Paper 2B3 — Monthly | $39.99 | per month |


## Frequently asked questions

### Is Water Treatment Level 3 free?

Water Treatment Level 3 is free to download, with in-app purchases available.

### Is PE2 Exam Pro free?

PE2 Exam Pro is free to download, with in-app purchases available.

### Do Water Treatment Level 3 or PE2 Exam Pro have ads?

Neither Water Treatment Level 3 nor PE2 Exam Pro shows ads.

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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.*