# Operator Master — Water and Wastewater exam prep

> Water and Wastewater exam prep (iPhone/iPad app by John Piontkowski.)

- Source: https://appshunter.io/ios/app/operator-master/id6813993332 (this page in markdown: same URL + `.md`)
- Developer: [John Piontkowski](https://appshunter.io/developer/6813993334)
- Category: Education, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 246 MB
- Languages: American English
- Released: 2026-11-05
- Data updated: 2026-11-13

## What is Operator Master?

Operator Master helps water and wastewater operators get ready for their certification exams.

• Answer Questions: mixed practice questions with a clear explanation after each answer.
• Math: wastewater calculations broken into steps, one skill at a time.
• Practice test: a timed, exam-style test that hides help until you finish.
• Ask Klok: missed a question? Tap Klok for an explanation, or ask him about a process, a piece of equipment or a math problem. Sign-in required; 5 free answers.
• Short lessons, glossary terms and pictures, formula help, and a free math course.
• Daily goal and streak to keep you studying.
• Works without an account; sign in with Apple or Google to save progress across devices.

Premium (optional subscription) adds a study plan built around your test date, the ready check, the 30-minute cram on your weak spots and more. Choose Premium Monthly, Premium Yearly, or Course Pass + Premium (Premium plus every course for credit, taken on operatormaster.com). Subscriptions renew automatically until cancelled in your Apple Account settings.

Levels follow the state you choose. Operator Master is an independent study tool and is not affiliated with or endorsed by WPI, PSI, ABC, the Washington State Department of Ecology or any other certification authority. It does not reproduce live or confidential exam questions, guarantee a passing score, or replace current regulations, approved references, facility procedures or qualified professional judgment.

Terms of Use: https://operatormaster.com/operator-master/terms
Privacy Policy: https://operatormaster.com/operator-master/privacy

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Yearly | $48.99 | per year |
| Premium Monthly | $6.99 | per month |
| Course Pass + Premium | $149.99 | per year |


## Is Operator Master safe?

Not enough ratings yet to assess Operator Master.

## Is Operator Master legit?

Operator Master has limited verification signals. The AppsHunter Legitimacy Score for Operator Master is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 1.0.3 — 2026-11-12

My Notes on the You tab, a check-in after your test date that tunes your daily practice, an untimed Cram Session, and Redeem a Code for offer codes.

### 1.0.2 — 2026-11-11

- Get Premium right in the app: monthly or yearly, with Restore Purchases
- New Courses tab with your progress on each course
- New Test-Ready Shorts: Activated Sludge, Source Water and Gravity Sewers
- A simpler Home, a cleaner Practice tab and a new Math screen
- Back buttons everywhere, study reminders, and many fixes

### 1.0 — 2026-11-05

No release notes.

## Related topics

[operator pro](https://appshunter.io/ios/topics/operator-pro) · [stormwater operator exam prep](https://appshunter.io/ios/topics/stormwater-operator-exam-prep)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-13.*