About
VoltExam
VoltExam makes exam prep apps for licensed tradespeople — the kind of people who need to pass a state licensing exam and get back to work. Each app combines 1,000+ practice questions with the built-in calculator they'll actually use on the job after passing. One-time $17.99 lifetime price. Works offline. No subscription.
Mission
Most exam prep apps are built for students with unlimited study time. VoltExam is built for working tradespeople who study during lunch breaks, between jobs, and on job sites with no cell signal. We keep things focused: the questions that actually appear on the exam, the calculations that matter on the job, and a price that doesn't require a monthly commitment.
Apps — 20 Live
CDL Hazmat Prep
Hazmat placarding guide + endorsement test prep
Real Estate Prep
Commission calculator + state licensing exam prep
Plumber Prep
Pipe sizing tools + journeyman exam practice
CWI Prep
Weld inspection tools + AWS certification practice
Crane Prep
Load chart calculator + NCCCO exam questions
Electrician Prep
Voltage drop calculator + 1,000+ NEC questions
HVAC Prep
Refrigerant charge calculator + EPA 608 questions
Forklift Prep
Load center calculator + OSHA certification prep
EMT Prep
GCS & burn calculator + NREMT exam questions
Security Guard Prep
Use-of-force reference + guard license exam prep
Notary Prep
Fee calculator + notary commission exam practice
Drone Prep
Airspace checker + Part 107 exam questions
Phlebotomy Prep
Order of draw + CPT certification exam practice
ASE Mechanic Prep
Torque reference + ASE A1–A8 exam practice
OSHA 30 Prep
Fall clearance calculator + OSHA 30 exam practice
Pesticide Applicator Prep
Mix rate calculator + pesticide license exam questions
Sterile Prep
Sterility reference + CRCST certification exam practice
Lead Renovator Prep
EPA RRP rule reference + lead renovation certification exam prep
Backflow Tester Prep
PSID calculator + backflow certification exam practice
Fire Alarm Prep
NICET fire alarm systems certification exam prep
How VoltExam Compares
vs. Pocket Prep — Pocket Prep charges $10–$20 per month per trade. VoltExam is $17.99 once, forever. Pocket Prep requires internet connectivity. VoltExam works fully offline.
vs. Dakota Prep — Dakota's Pro plan costs $90–$150 for a single trade. VoltExam covers 19 trade categories at $17.99 each. Dakota has a larger question bank and an AI tutor; VoltExam has built-in job-site calculators and a price that doesn't require justifying to your employer.
vs. SkillCat — SkillCat focuses on HVAC and EPA 608 at $10/month and includes the actual exam booking. VoltExam is practice-only, covers 19 trades, and costs $17.99one time.
Free tools — Every built-in calculator is also available free on the web at voltexam.com/tools — no account required, works in any browser.
Contact
Support — [email protected]. We reply within 24 hours.
Press — See the press page for app screenshots, icons, and brand assets.
iOS apps — All VoltExam apps are published under Deeun Inc. on the Apple App Store.