608
Practice for the EPA 608 exam. On the job, offline.
Core, Type I, Type II and Type III practice questions with the reasoning behind every answer, a readiness gauge for your Universal card and a timed mock exam. Built for HVAC/R techs, one hand, no signal needed.
Core is free. Pro is a one-time purchase, no subscription.
Features
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Readiness Ring
One gauge for your Universal card: your chance of reaching 70% in each section, from your recent answers, and the section to study next. An estimate, never a promise.
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300+ reviewed questions
Core, Type I, Type II and Type III, written and reviewed against the federal Section 608 rules (40 CFR Part 82, Subpart F), each with a plain-English explanation.
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Updated for the AIM Act
The HFC leak repair rules in force since January 1, 2026, A2L refrigerants and the new refrigerant lineup.
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100% offline study
Questions, explanations and your progress live on your phone. Study in a basement mechanical room or on a rooftop with no signal.
Support
Questions, a wrong answer to report, or trouble with a purchase? Write to [email protected]. We read every message.
- I bought Pro on another iPhone. How do I get it back?
- Sign in with the same Apple ID, open any locked section and tap Restore Purchases at the bottom of the screen.
- Does the app need an internet connection?
- Only to buy or restore Pro. Studying, the mock exam and your progress work fully offline.
- How do I ask for a refund?
- Purchases are handled by Apple: request a refund at reportaproblem.apple.com.
- What is free and what is Pro?
- Core is free, with its explanations, the Readiness Ring and the Toolbox. Pro unlocks Type I, Type II, Type III, the timed Mock Exam and Cram Mode across the whole bank, with a one-time purchase.
Privacy Policy
Effective October 7, 2026
The short version
We don't collect personal data. No account, no ads, no usage analytics, no tracking. Your answers and progress never leave your phone. Studying works 100% offline.
What stays on your device
Your answers, your progress, your readiness and your mock exam results are saved only on your device. We can't see them. Deleting the app deletes them.
In-app purchase
Apple processes the payment: we never see your name, email or payment details. To unlock and restore Pro, the app sends your App Store purchase receipt and an anonymous app ID to RevenueCat, our in-app purchase provider, which keeps your purchase history to confirm that Pro is yours and to give us aggregate sales reports. Nothing else is sent.
No tracking
The app doesn't track you across apps or websites, doesn't use the advertising identifier and contains no advertising or analytics SDKs.
If you email us
We use your email address and message only to answer you, and we don't share them.
Children
The app is made for HVAC/R technicians and is not directed to children under 13.
Changes and contact
If this policy changes, we'll update this page and its date. Questions: [email protected].