★★★★
4.0 rating, 110 reviews
Pass your EPA 608 exam on the first try
Over 1,000 practice questions across 5 study modes. Smart Practice adapts to your weak spots so you study what matters most.
Over 1,000 practice questions across 5 study modes. Smart Practice adapts to your weak spots so you study what matters most.
Three steps to EPA 608 certification
Start with Cram Mode to absorb questions and answers, then use Study Mode to test yourself at your own pace.
Smart Practice targets questions you get wrong most. Most Missed mode zeroes in on your trouble areas.
Take Mock Exams with 25 random questions and a 72% passing threshold, just like the actual test.
Built specifically for HVAC technicians preparing for EPA Section 608 certification
Adaptive sessions weighted 75% toward your weakest questions. Mastered questions (3 correct in a row) are excluded automatically.
Read every question with the answer and explanation visible. No pressure, no scoring, just learn the material.
Work through questions at your own pace with instant feedback. Your position is saved between sessions.
25 random questions per section, no feedback until the end, 72% to pass. Matches the real exam format.
Questions you get wrong most often, sorted by miss count. Auto-removes mastered questions as you improve.
Save tricky questions from any mode. Access them per section or view all bookmarks across categories.
Readiness scores, mastery counts, best test scores, and complete result history for every section.
All 1,000+ questions work without an internet connection. Study on job sites, in the truck, anywhere.
Set daily or weekly notifications at a time you choose. Build a study streak and stay consistent.
Swipe through the app screens
Home Screen
Study Flow
Cram Mode
Study Mode
Mock Exam
Results
Progress Tracking
Most Missed
Comprehensive question banks for every certification level
Ozone depletion, the Clean Air Act, refrigerant safety, and proper handling procedures. Required for any Type certification.
Small appliances with 5 lbs or less of refrigerant: window units, refrigerators, and vending machines.
High-pressure appliances: residential A/C, heat pumps, and commercial refrigeration systems.
Low-pressure appliances: chillers used in large commercial and industrial HVAC systems.
Real reviews from people who passed their exam
"This app is amazing! I used it, and only missed one question on my 608 test. If you're taking the EPA 608 test and you want to ace it, this is what you need."
"After looking at a few books and debating over taking a class, I found this app. I spent 2 days just using this app and now I just finished the test. Simply amazing."
"Using this app with the book, my scores went from way low to passing with 90-100% each time. I feel very confident I'll be holding my universal HVAC license soon."
Take a free 20-question practice test right in your browser. No download or signup required.
Start Free Practice TestJoin thousands of HVAC technicians who passed their EPA 608 exam with this app.