# Water Operator Prep — Treatment, distribution, math

> Treatment, distribution, math (iPhone/iPad app by 德武 江.)

- Source: https://appshunter.io/ios/app/water-operator-prep/id6814912126 (this page in markdown: same URL + `.md`)
- Developer: [德武 江](https://appshunter.io/developer/6809179858)
- Category: Education, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 7 MB
- Languages: American English
- Released: 2026-09-29
- Data updated: 2026-10-03

## What is Water Operator Prep?

Practice for water and wastewater operator certification with 3,576 questions, every single
one carrying a written explanation of why the correct answer is correct and why the others
are not.

Ten banks, one subscription:

- Operator Math - 296 calculations, worked step by step
- Treatment Processes - 675 questions
- Collection Systems - 554 questions
- Collection Maintenance - 405 questions
- Plant Operations - 388 questions
- Backflow Prevention - 287 questions
- Advanced Treatment - 253 questions
- Distribution - 243 questions
- Wastewater Treatment - 240 questions
- Drinking Water Basics - 235 questions

THE MATH IS WORKED OUT, NOT JUST ANSWERED

Most operators lose marks on the calculations, and most practice apps skip them. This one
has 296: chemical dosage and the pounds formula, hypochlorite strength, chlorine demand,
detention time, surface and weir overflow rates, filtration and backwash rates, pipe
velocity, per cent removal, water and brake horsepower, CT values, solids loading, specific
capacity, flow conversions and tank volumes.

Every calculation shows the formula, the numbers substituted in, and the arithmetic - then
names the mistake that question is designed to catch. Forgetting the 8.34. Squaring the
diameter instead of the radius. Leaving the pipe diameter in inches. Mixing up 7.48 gallons
per cubic foot with 8.34 pounds per gallon.

BUILT FOR WHERE YOU ACTUALLY STUDY

Everything is in the app. No account, no sign-in, no server, and no signal required - it
works in a plant basement, in a truck, or on a plane. Nothing you do is sent anywhere.

HOW IT WORKS

- Answer a question and the explanation opens straight away
- Practise in order, draw at random, or redo only the ones you got wrong
- Mock exams are timed and scored against a 70 per cent pass mark
- Read-through lays out every question with its answer and explanation for revision
- Progress, accuracy and streaks are tracked per bank
- Search across a bank by keyword
- Light and dark, three text sizes

FREE AND PAID

Your first day gives you 25 free questions, and after that it is ten a day. The allowance
is shared across all ten banks, so it is ten questions in the app rather than ten in each.
One subscription removes the daily limit and opens mock exams and read-through in every
bank - there is no per-bank purchase.

ABOUT THE QUESTIONS

These are practice questions written for this app. They follow the topics that standardised
water and wastewater operator examinations cover, but they are not actual exam questions and
this app is not affiliated with, endorsed by or sponsored by any certifying body, state
agency, testing organisation or training provider.

SUBSCRIPTION TERMS

Weekly - $5.99 for 1 week. Monthly - $11.99 for 1 month. Yearly - $69.99 for 1 year.
All three unlock the same thing and renew automatically. Payment is charged to your
Apple Account at confirmation. The subscription renews unless auto-renew is turned off
at least 24 hours before the end of the current period; your account is charged for
renewal within 24 hours before the period ends. Manage or cancel any time in
Settings - Apple Account - Subscriptions.

Terms of Use (EULA): https://jdw159828-glitch.github.io/privacy-policy/terms.html
Privacy Policy: https://jdw159828-glitch.github.io/privacy-policy/privacy.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Yearly | $69.99 | per year |
| Monthly | $11.99 | per month |
| Weekly | $5.99 | per 7 days |


## Is Water Operator Prep safe?

Not enough ratings yet to assess Water Operator Prep.

## Is Water Operator Prep legit?

Water Operator Prep appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Water Operator Prep is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-09-30

No release notes.

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All apps by 德武 江: https://appshunter.io/developer/6809179858

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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 2026-10-03.*