Apps / Pool Operator Prep
Pool Operator Prep
SafetyLive on App StorePool chemistry calculator + PHTA CPO certification exam prep
iOS · Free to download · $17.99 one-time unlock
Why Pool Operator Prep?
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
How It Works
Step 01
Download Free
Free to download on the App Store — unlock everything once for $17.99.
Step 02
Practice Daily
Built-in calculators you'll use on the job — not just quizzes.
Step 03
Pass First Try
$17.99 once. No subscriptions. No recurring fees.
App Screenshots
Practice Questions
Built-in Calculator
Progress Dashboard
Screenshots coming soon — download from the App Store to see the full experience.
Pricing
VoltExam
$17.99one-time
- ✓ Pay once, use forever
- ✓ No monthly fees
- ✓ Full offline access
- ✓ All updates included
Competitors
$20+/month
- ✕ Subscription required
- ✕ Lose access if you cancel
- ✕ Often requires Wi-Fi
- ✕ $240+ per year
Trusted by Tradespeople
“Passed my certification on the first try. The built-in calculator is exactly what the exam tests.”
— A. Johnson, Tradesperson, Texas
“Best $17.99 I've spent on exam prep. The practice questions are harder than the real test — in the best way.”
— M. Williams, Tradesperson, Florida
