Practice exams built on a simple idea: every answer verified, every question explained, and your weak areas drilled automatically — because the official app's own reviews say its answers can't be trusted.
Free to try — no account needed. Sample bank Demo ships 26 sample questions; the verified bank is the paid roadmap.
Not a question dump. A practice system that tells you exactly where you stand against the 70% pass bar — and what to drill next.
Every question carries a citation to the ABC Need-to-Know Criteria domain it was checked against, plus a human-verified flag. The official app's reviews document wrong answers — trust is the product here.
One click builds a session from your history: questions you missed first, then unseen questions in your weakest domains. Nobody else auto-targets your weak spots.
Mirrors the ABC standardized format — 100 questions, 180 minutes — with a live timer and a question palette like real exam software.
Per-domain and per-grade (Class I–IV) readiness against the 70% pass bar, with a cumulative score trend. Pass Class I, climb to Class IV on the same purchase.
Operator math is the #1 exam fail reason. Seven solvers — lbs/day, CT, detention time, chemical feed and more — each with step-by-step worked solutions.
$49 per exam class or $99 for everything — pay once, keep it forever. The official app charges $49.99 every 12 months; courses run $180–$300 per class.
We're not the biggest bank — yet. Here's where each option actually stands, including where competitors still lead.
| AWWA Opcert app (official) | American Water College | WEF / ABC study guide | OperatorPrep | |
|---|---|---|---|---|
| Questions | 2,800+ | Course videos, few practice Qs | ~200 static per book | 26 samples now → 500/class verified (roadmap) |
| Answer accuracy | Reviews document wrong answers | — | Publisher-vetted | Citation + verified flag per question |
| Explanations | Reviews say many missing | n/a | Book text | Required on every question |
| Weak-area drilling | Filter by subject only | No | No | Smart drill from your history |
| Grade-ladder tracking | Grade filters | Per-course | Levels 1–4 books | Per-grade readiness I–IV + track |
| Price | $29.99/6 mo or $49.99/12 mo | $179.99–$299.99 / class | ~$100 / book | $49 one-time / $99 all-access |
Where they still lead: raw bank size (2,800+ vs. our 26 samples — the honest gap) and the official app's brand authority.
Pay once, keep it forever — including when you climb from Class I to Class IV.
One class — e.g. Water Treatment — all grades I–IV.
All four classes (WT, WD, WWT, WWC), all grades.
No. ABC and AWWA names are used only to identify the certification exams covered. OperatorPrep is an independent practice tool.
Water Treatment (WT), Water Distribution (WD), Wastewater Treatment (WWT), and Wastewater Collection (WWC), each across grades Class I–IV — aligned to ABC's Need-to-Know Criteria.
Operators study in bursts around an exam date, then climb grades over years. A subscription taxes you for the gaps; one payment covers your whole ladder.
The demo ships 26 clearly-labeled sample questions. The launch target is 500+ human-verified questions per exam class, each citing its ABC criteria domain. We won't charge until it's done — the dashboard shows the verification count honestly.
Yes — the app is fully mobile-responsive, and your progress follows your account.
Free to try. No account needed to start. Verified accuracy or it doesn't ship.
Start practicing free