# EPA 608 Practice Test 2026 vs SkillMill Project

The clearest difference is in-app purchases: SkillMill Project at none against EPA 608 Practice Test 2026's 5. SkillMill Project also leads on ads (none vs shown) and update cadence (monthly vs every 3 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. EPA 608 Practice Test 2026 sells 5 in-app purchases, starting at $9.99 per 7 days. SkillMill Project asks for nothing beyond the download.

EPA 608 Practice Test 2026 ships an update every 3 months, SkillMill Project monthly. The most recent releases landed on October 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | EPA 608 Practice Test 2026 | SkillMill Project |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (2.6K ratings)](https://appshunter.io/ios/app/epa-608-practice-test-2026/id1528925410/reviews)** | — |
| Number of ratings | **2.6K** | — |
| Positive reviews | 88.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 72 MB | 45 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thanh Hung](https://appshunter.io/developer/1059077329) | [Uppsala University](https://appshunter.io/developer/380077092) |

## What reviewers say

### EPA 608 Practice Test 2026

[App page](https://appshunter.io/ios/app/epa-608-practice-test-2026/id1528925410)

Prepare for your EPA 608 HVAC certification with over 500 practice questions and smart analytics. This app offers offline access, topic-based study, mock tests, and personalized plans to help you pass on your first attempt.

**Highlights:** 500+ practice questions, Smart analytics, Offline access, Topic-based practice, Mock tests, Personalized study plan, AI Study Assistant

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EPA 608 HVAC Subscription Week | $9.99 | per 7 days |
| EPA 608 Subscription Monthly | $19.99 | per month |
| EPA Quarterly Subscription | $39.99 | per 3 months |
| EPA 608 Subscription Yearly | $69.99 | per year |
| Pro | $9.99 | one-time |

**What reviewers like**

- 👍 Good for preparing for the test
- 👍 Helpful and easy to use
- 👍 Useful practice questions and knowledge checks
- 👍 Passed the exam on the first try
- 👍 Covered all the necessary information for the EPA 608 exam

**What reviewers complain about**

- 🐛 Some questions are outdated or have incorrect answers
- 🐛 Wording issues with some questions
- 🔒 Difficulty canceling subscriptions
- 🐛 Inconsistencies between questions

**Reported bugs**

- Loss of pro access after subscription cancellation
- Outdated leak rate information in some questions

**Requested features**

- Updated questions to reflect current EPA 608 requirements
- Improved explanations for incorrect answers
- Option to customize practice tests


### SkillMill Project

[App page](https://appshunter.io/ios/app/skillmill-project/id1584345043)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EPA 608 Practice Test 2026 free?

EPA 608 Practice Test 2026 is free to download, with in-app purchases available.

### Is SkillMill Project free?

SkillMill Project is free to download, with no in-app purchases.

### Do EPA 608 Practice Test 2026 or SkillMill Project have ads?

EPA 608 Practice Test 2026 shows ads; SkillMill Project does not.

### Which is updated more often, EPA 608 Practice Test 2026 or SkillMill Project?

EPA 608 Practice Test 2026 ships an update every 3 months, and SkillMill Project monthly. Most recently, EPA 608 Practice Test 2026 was updated on October 25, 2026 and SkillMill Project on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*