# A2L & EPA 608 Test Prep — Core & Universal Practice Exam

> HVAC refrigerant charging tool for next-generation gases with error-proof calculations. (iPhone/iPad app by Mike Watson.)

- Source: https://appshunter.io/ios/app/a2l-and-epa-608-test-prep/id6760899340 (this page in markdown: same URL + `.md`)
- Developer: [Mike Watson](https://appshunter.io/developer/1848411021)
- Category: Education, Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 5 App Store ratings
- Age rating: 4+
- Requires: iOS 15.1 · 47 MB
- Languages: American English
- Released: 2026-03-24
- Data updated: 2026-10-24
- Monetization: free with in-app purchases

## What is A2L & EPA 608 Test Prep?

Studying for EPA 608 or your A2L card? Practice with original exam-style questions and explanations, then keep the field tools you'll use on the job.

EPA 608 PRACTICE — NEW
• 250+ original questions across Core, Type I (small appliances), Type II (high-pressure) and Type III (low-pressure)
• 25-question section mock exams, plus a 100-question Universal mock with all four sections in order
• Each section is scored on its own against 18 of 25 — the commonly published pass mark — so you see exactly which section needs work
• Written against the current federal rules: venting and de minimis releases, required evacuation levels, leak repair rates and deadlines, recovery equipment, recordkeeping, sales restriction and safe disposal
• Quick 10 across all sections and single-section drills for review

A2L / LOW GWP PRACTICE
• 300+ original questions across 11 topics: A2L characteristics and ASHRAE 34 classes, flammability and GWP, codes, tools, handling and transport, leak detection, recovery and evacuation, servicing and charging, installation and charge limits, emergency procedures, retrofit
• Quick 10, single-topic drills, and a 50-question mock exam with an optional timer
• Math questions are solved by the same engine as the calculators

STUDY YOUR WAY
• Every answer comes with an explanation
• Score by topic or section, review every miss, track accuracy over time — all stored on your phone
• Switch between A2L and EPA 608 with one tap

FIELD TOOLS YOU KEEP AFTER THE EXAM
• Superheat and subcooling for R-454B, R-32 and R-410A, with dew and bubble point applied automatically on R-454B
• Max Allowable Charge — nameplate check against the room's passive limit, with m1 / m2 / m3 charge tier
• A2L quick reference and one-page PDF job tickets with your company branding

BUILT FOR THE FIELD
No account, no login, no signal required. Dark mode. Your progress and job data stay on your phone.

FREE, WITH AN OPTIONAL $0.99 UPGRADE
Every question and tool is free. Ads keep it that way; one daily mock exam is free and an optional short video unlocks another. A one-time $0.99 purchase removes all ads and unlocks unlimited mock exams. No subscriptions.

SOURCES
EPA 608 content: 40 CFR Part 82 Subpart F and Part 84 as of 2026. PT data: NIST REFPROP 10.0 via National Refrigerants (R-454B), Daikin / Hudson Technologies (R-32), National Refrigerants Reference Guide (R-410A). Max charge formula structure: UL 60335-2-40 / ASHRAE 15.2.

Independent study tool. Not affiliated with, endorsed by, or approved by ESCO Institute, Mainstream Engineering, the U.S. EPA, or any certifying body. EPA 608 certification requires passing a proctored test from an EPA-approved certifying organization. All practice questions are original material.

## Key features

- A2L-ready for R-454B and R-32
- Error-proof superheat/subcooling calculations
- Integrated Max Allowable Charge Calculator
- Branded PDF field reports
- Offline P/T charts and safety guides
- No account or login required

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| A2L SafeCharge Pro | $1.99 | one-time |


## Is A2L & EPA 608 Test Prep safe?

Not enough ratings yet to assess A2L & EPA 608 Test Prep.

## Is A2L & EPA 608 Test Prep legit?

A2L & EPA 608 Test Prep appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for A2L & EPA 608 Test Prep is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Frequently asked questions about A2L & EPA 608 Test Prep

### What refrigerants does A2L Safe Charge support?

A2L Safe Charge fully supports next-generation refrigerants R-454B and R-32, in addition to R-410A. This makes it a versatile tool for modern HVAC systems.

### How does A2L Safe Charge prevent charging errors?

The app automatically applies Dew Point for superheat and Bubble Point for subcooling on R-454B. This feature eliminates the most common A2L charging mistakes, ensuring accuracy.

### Can I calculate safe refrigerant charge limits with A2L Safe Charge?

Yes, A2L Safe Charge includes an integrated Max Allowable Charge Calculator. You can enter room dimensions to instantly get your safe charge limit based on current A2L safety standards.

### Does A2L Safe Charge require an internet connection?

No, A2L Safe Charge offers full offline reference capabilities. This includes P/T charts, refrigerant comparisons, and safety guides, meaning you can use it without cell service.

### Can I generate reports with A2L Safe Charge?

Yes, you can generate professional, branded PDF field reports directly within A2L Safe Charge. These reports can include your company name and logo and be emailed to clients.

### Is my data collected by A2L Safe Charge?

A2L Safe Charge is privacy-focused and collects no data. All information and calculations performed on the job site remain on your device.

### What devices is A2L Safe Charge available on?

A2L Safe Charge is available for iPhone, iPad, and iPod. It is designed for iOS devices.

### How often is A2L Safe Charge updated?

The latest version of A2L Safe Charge is 1.1.1, which was last updated on April 19, 2026. Updates typically address performance improvements and feature enhancements.

## Version history (last 5 releases)

### 2.3.0 — 2026-10-21

NEW: EPA 608 practice.

• 250+ original questions for Core, Type I, Type II and Type III
• Section mock exams (25 questions, 18 to pass) and a 100-question Universal mock
• Switch between A2L and EPA 608 at the top of Practice
• New: remove all ads with a one-time $0.99 purchase — also unlocks unlimited mock exams. No subscription.

A2L practice, calculators and PDF job tickets are unchanged. Questions or corrections: Settings → Send Feedback.

### 2.2.0 — 2026-10-02

Stability improvements. After you pass a practice session or export a report, you may see a request to rate the app. Ratings help other technicians find it.

### 2.1.3 — 2026-09-16

• Stability improvements: if something goes wrong, the app now shows a Try again button instead of a blank screen
• Behind-the-scenes groundwork so future fixes can reach you faster

Questions or corrections: Settings → Send Feedback.

### 2.1.2 — 2026-09-12

• Ads no longer pop up while you're typing a reading. The calculators wait until you've finished entering numbers, and History saves one entry per reading instead of one for every digit
• Watching an ad to unlock an extra mock exam now starts the exam, and its timer, only after the ad closes
• If an unlock ad can't load, the mock exam unlocks anyway instead of leaving the button stuck

Questions or corrections: Settings → Send Feedback.

### 2.1.1 — 2026-09-10

• Fewer ads: the banner under the keypad on both calculator screens is gone
• Anonymous usage stats so we can see which tools and practice modes get used — never your inputs, answers, or results. Switch it off any time in Settings → "Share anonymous usage stats"
• Practice mode, the 50-question mock exam, and the R-454B field calculators are unchanged

Questions or corrections: Settings → Send Feedback.

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All apps by Mike Watson: https://appshunter.io/developer/1848411021

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*