# GRE Vocabulary Builder vs EPA 608 Study Guide

The clearest difference is in-app purchases: GRE Vocabulary Builder at none against EPA 608 Study Guide's 4. GRE Vocabulary Builder also leads on ratings volume (113 vs 1) and iOS requirement (13.0 vs 15.0). EPA 608 Study Guide's advantage is rating (5.0 vs 4.6). On price, ads and device support there is nothing between them.

Both are free to download. EPA 608 Study Guide sells 4 in-app purchases, starting at $2.99 per 7 days. GRE Vocabulary Builder asks for nothing beyond the download.

EPA 608 Study Guide holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: GRE Vocabulary Builder has 113 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | GRE Vocabulary Builder | EPA 608 Study Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (113 ratings)](https://appshunter.io/ios/app/gre-vocabulary-builder/id1609463254/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/epa-608-study-guide-hvac/id6802107710/reviews)** |
| Number of ratings | **113** | 1 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | **Free** | Free with in-app purchases |
| Size | 71 MB | 19 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Reev Tech Inc.](https://appshunter.io/developer/1226698203) | [DMP ENTERPRISE LLC](https://appshunter.io/developer/1808322033) |

## What reviewers say

### GRE Vocabulary Builder

[App page](https://appshunter.io/ios/app/gre-vocabulary-builder/id1609463254)

Prepare for the GRE with over 1,300 essential words and a comprehensive study guide. Interactive flashcards, audio lessons, and progress tracking help you master vocabulary and understand the test structure. Study offline anytime, anywhere.

**Highlights:** 1300+ GRE words, Interactive flashcards, GRE study guide, Audio-enabled lessons, Progress tracking, Offline mode

**Features:** macOS Compatibility

**In-app purchases:** none


### EPA 608 Study Guide

[App page](https://appshunter.io/ios/app/epa-608-study-guide-hvac/id6802107710)

Prepare for the EPA 608 Technician Certification exam with this offline study guide. It covers Core, Type I, II, and III sections with flashcards, practice questions, and a glossary. Study key numbers, dates, and rules specific to HVAC/R refrigerant handling.

**Highlights:** Offline study companion, Covers Core, Type I, II, III sections, Flashcards and multiple-choice questions, True/false drills and term matching, Searchable glossary, Key numbers and dates reference, Real service scenario practice questions

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $2.99 | per 7 days |
| Premium Monthly | $6.99 | per month |
| Premium Annual | $19.99 | per year |
| Premium Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is GRE Vocabulary Builder free?

GRE Vocabulary Builder is free to download, with no in-app purchases.

### Is EPA 608 Study Guide free?

EPA 608 Study Guide is free to download, with in-app purchases available.

### Which has better reviews, GRE Vocabulary Builder or EPA 608 Study Guide?

EPA 608 Study Guide is rated higher. GRE Vocabulary Builder averages 4.6 out of 5 from 113 ratings, while EPA 608 Study Guide averages 5.0 from 1 ratings.

### Do GRE Vocabulary Builder or EPA 608 Study Guide have ads?

Neither GRE Vocabulary Builder nor EPA 608 Study Guide shows ads.

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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.*