Apps / Pool Operator Prep
Pool Operator Prep
SafetyLive on App StorePool Operator Prep is an iOS app for the PHTA Certified Pool Operator (CPO) certification exam — it includes 450+ practice questions covering pool chemistry, water testing, filtration systems, chemical safety, and health codes, plus a built-in pool chemical dosing calculator for chlorine, pH, and alkalinity adjustments, for $49.99 with lifetime access, no subscription, works offline.
iOS · Android coming soon · Free to download · $49.99 one-time unlock
Everything You Need to Pass the PHTA CPO Certification Exam
Pool Chemical Calculator
450+ official-style PHTA CPO exam questions covering pool chemistry, safety, and operations
450+ Practice Questions
Built-in pool chemical dosing calculator — volume, chlorine dosing, and pH adjustment
Works Offline
Full offline access — study and calculate anywhere without Wi-Fi
Progress Tracking
Per-topic progress tracking across all CPO exam categories
What’s on the Pool Operator Exam?
Topic weights are approximate. VoltExam’s question bank covers every topic area above.
How It Works
Step 01
Download Free
Free to download on the App Store — unlock everything once for $49.99.
Step 02
Practice Daily
Built-in calculators you'll use on the job — not just quizzes.
Step 03
Pass First Try
$49.99 once. No subscriptions. No recurring fees.
Pricing
VoltExam
$49.99one-time
- ✓ Pay once, use forever
- ✓ No monthly fees
- ✓ Full offline access
- ✓ All updates included
Competitors
$60–$180/year
- ✕ Subscription required
- ✕ Lose access if you cancel
- ✕ Often requires Wi-Fi
- ✕ Recurring fees forever
Pool Operators Who Passed the CPO Exam First Try
“Passed my CPO exam on the first try. The pool chemical calculator is something I actually use on the job now — chlorine dosing and pH adjustment are instant.”
— Marcus T., Pool Operator, Arizona
“The water chemistry questions are harder than what was on my real CPO exam. Walked in prepared for everything they threw at me.”
— Diane R., Aquatics Director, Florida
Frequently Asked Questions
What is the CPO certification?
The Certified Pool Operator (CPO) certification is issued by the Pool & Hot Tub Alliance (PHTA) and is the most widely recognized pool operator credential in the US. It covers pool chemistry, water testing, filtration, disinfection, and health codes. Most states and facilities require a CPO or equivalent for commercial pool operation.
How many questions are on the CPO exam?
The PHTA CPO exam has 50 multiple-choice questions. You have 2 hours to complete it, and a passing score is 75% (38 out of 50 questions). The exam is closed-book and administered at the end of the 2-day CPO course or online.
What topics are on the CPO exam?
The CPO exam covers pool and spa chemistry (pH, total alkalinity, calcium hardness, chlorine residual), water balance, testing procedures, filtration systems, chemical safety and MSDS, health codes and regulations, circulation systems, pool construction, and recreational water illness (RWI) prevention.
How long is CPO certification valid?
CPO certification is valid for 5 years. Renewal requires completing a CPO renewal course — no written exam is required for renewal. Many employers cover the course cost since a valid CPO certificate is required to operate commercial pools.
Free Web Tools
Free Pool Operator Prep Practice Questions
Browse topic-by-topic in your browser — no app required
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