# Wastewater Operator Test Prep vs Wastewater Operator Prep

The clearest difference is rating: Wastewater Operator Test Prep at 5.0 against Wastewater Operator Prep's 4.5. Wastewater Operator Test Prep also leads on in-app purchases (none vs 3) and iOS requirement (15.1 vs 17.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Wastewater Operator Prep sells 3 in-app purchases, starting at $5.99 per 7 days. Wastewater Operator Test Prep asks for nothing beyond the download.

Wastewater Operator Test Prep holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 9, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Wastewater Operator Test Prep | Wastewater Operator Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/wastewater-operator-test-prep/id6761349297/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/wastewater-operator-prep-exam/id6789188108/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 28 MB | 9 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mike Watson](https://appshunter.io/developer/1848411021) | [Hermes Inteligencia Digital Ltda](https://appshunter.io/developer/1896694873) |

## What reviewers say

### Wastewater Operator Test Prep

[App page](https://appshunter.io/ios/app/wastewater-operator-test-prep/id6761349297)

This professional calculator provides 16 essential wastewater treatment calculations for licensed operators, covering Class I through Class IV certification math. It displays formulas and substituted values for easy verification and works completely offline, making it ideal for field use.

**Highlights:** 16 essential wastewater calculations, Supports Class I-IV certification math, Shows formulas and substituted values, Works 100% offline, Large, readable results for field use, Copy result for sharing, Calculation history

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

**In-app purchases:** none


### Wastewater Operator Prep

[App page](https://appshunter.io/ios/app/wastewater-operator-prep-exam/id6789188108)

Prepare for your wastewater operator certification exam with extensive practice questions and detailed explanations. This app covers all treatment processes and offers personalized study plans, timed modes, and progress tracking to boost your confidence and understanding.

**Highlights:** 1,027 practice questions, Detailed explanations for each answer, Full treatment process coverage, Personalized daily study plans, Timed practice modes, Progress tracking and pass probability

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Wastewater Prep Weekly | $5.99 | per 7 days |
| Wastewater Prep Monthly | $14.99 | per month |
| Quarterly | $29.99 | per 3 months |


## Frequently asked questions

### Is Wastewater Operator Test Prep free?

Wastewater Operator Test Prep is free to download, with no in-app purchases.

### Is Wastewater Operator Prep free?

Wastewater Operator Prep is free to download, with in-app purchases available.

### Which has better reviews, Wastewater Operator Test Prep or Wastewater Operator Prep?

Wastewater Operator Test Prep is rated higher. Wastewater Operator Test Prep averages 5.0 out of 5 from 1 ratings, while Wastewater Operator Prep averages 4.5 from 2 ratings.

### Do Wastewater Operator Test Prep or Wastewater Operator Prep have ads?

Neither Wastewater Operator Test Prep nor Wastewater Operator Prep shows ads.

### Which is updated more often, Wastewater Operator Test Prep or Wastewater Operator Prep?

Wastewater Operator Test Prep ships an update monthly, and Wastewater Operator Prep monthly. Most recently, Wastewater Operator Test Prep was updated on October 9, 2026 and Wastewater Operator Prep on October 29, 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.*