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A question counts as mastered once you’ve answered it correctly twice. The Analysis tab shows what you’ve mastered, what you’re still learning and what you haven’t seen yet.

It takes 25 questions from each of Core, Type I, Type II and Type III, favoring the ones you’ve seen least, and shuffles them into 100 questions on a 2-hour clock. Like the real exam, it doesn’t tell you right or wrong as you answer; the results show your score for each section and every question you missed. If you leave partway through, you can resume where you stopped.

They use the SM-2 spaced-repetition method. Each day’s deck starts with the cards that are due, most overdue first, plus up to 10 new ones. Flip a card, then tap Knew it or Didn’t know (or swipe right or left), and the app schedules its next review.

It’s an estimate based on your practice results, to help you decide what to study next. It can’t predict or guarantee your result on the real exam.

Yes. Turn on study reminders in Settings and pick a time for the daily one. If you’ve set an exam date, you’ll also get one the evening before. Your phone schedules reminders itself, so nothing is sent to us, and the app never sends marketing notifications.

The app asks how it went, once a day for up to three days. Tell it you passed and the countdown switches off, and you can share a picture of your result. Not this time? It shows your two weakest sections and starts a session in the weakest. If your date changed, enter the new one and the countdown restarts. Your answer stays on your phone.

Yes, on iPhone and Android. It shows your study streak and the countdown to your exam date, and updates after midnight. On iPhone there are small and medium Home Screen widgets, plus two Lock Screen widgets on iOS 16 or later.

Four sections, Core, Type I, Type II and Type III, with 25 questions each. You need 70% in a section to pass it, and passing all four makes you certified Universal.

Open Where to Take the Exam on the Practice tab (it’s also in Settings → Study Plan). It explains the exam format, EPA’s list of approved certification programs, and your options for testing online or in person. The app itself doesn’t give the exam or certify you.

The question bank has been updated for the 2026 exam revision, which adds A2L refrigerants and moves examples to R-32 and R-454B. Regulations and exam content change, so if something looks wrong, please report it from the question.

No to both. EPA 608 Mastery Pro is an independent study aid, not affiliated with the U.S. Environmental Protection Agency or any certifying organization. You take the exam through an EPA-approved certifying organization; the app helps you prepare but can’t guarantee a pass.

Free includes 200 practice questions (50 from each section) with explanations, one full mock exam, the complete reference library, search, bookmarks, notes, progress tracking, streaks and reminders. Premium adds the full question bank of more than 1,100 questions, unlimited mock exams, Custom Quiz, Weakest Subjects and the flashcards.

No. It’s a single purchase through the App Store or Google Play. There’s nothing to cancel and no renewal.

No. A purchase belongs to the store you bought it from and can’t be moved between Apple and Google. You can restore it on any device signed in to the same store account.

Yes. Every question, flashcard and reference table is built into the app. It only goes online for purchases and, on iPhone and iPad, to tell us whether one of our App Store ads led to your download.

Your study progress is stored only on your phone. We don’t receive it or sync it. Your phone’s own backup, such as iCloud Backup or Google’s Android backup, may include it, depending on your settings. Premium can always be restored with Restore Purchases.

iPhone and iPad with iOS or iPadOS 15 or later, and Android phones and tablets with Android 7.0 or later.

Your study data stays on your phone, so you can delete it yourself. We can also delete your purchase records. The steps are on Delete your data.