# USPS Postal Exam Prep vs EPA 608 Practice Test & Prep

The clearest difference is price: EPA 608 Practice Test & Prep at Free against USPS Postal Exam Prep's $8.99. USPS Postal Exam Prep's advantage is in-app purchases (none vs 2) and update cadence (every 3 weeks vs every 3 months). On ads, device support and iOS requirement there is nothing between them.

EPA 608 Practice Test & Prep is free to download; USPS Postal Exam Prep costs $8.99 up front. EPA 608 Practice Test & Prep sells 2 in-app purchases, starting at $4.99 per 7 days. USPS Postal Exam Prep asks for nothing beyond the download.

USPS Postal Exam Prep ships an update every 3 weeks, EPA 608 Practice Test & Prep every 3 months. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | USPS Postal Exam Prep | EPA 608 Practice Test & Prep |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 3 MB | 32 MB |
| Requires iOS | 18.5 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Christopher Enim](https://appshunter.io/developer/1722100693) | [Redouan Afoulous](https://appshunter.io/developer/1896591505) |

## What reviewers say

### USPS Postal Exam Prep

[App page](https://appshunter.io/ios/app/usps-postal-exam-prep/id6754321097)

**Features:** macOS Compatibility

**In-app purchases:** none


### EPA 608 Practice Test & Prep

[App page](https://appshunter.io/ios/app/epa-608-practice-test-and-prep/id6788551703)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Plan | $4.99 | per 7 days |
| Yearly Pro Plan | $19.99 | per year |


## Frequently asked questions

### Is USPS Postal Exam Prep free?

USPS Postal Exam Prep costs $8.99, with no in-app purchases.

### Is EPA 608 Practice Test & Prep free?

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

### Do USPS Postal Exam Prep or EPA 608 Practice Test & Prep have ads?

Neither USPS Postal Exam Prep nor EPA 608 Practice Test & Prep shows ads.

### Which is updated more often, USPS Postal Exam Prep or EPA 608 Practice Test & Prep?

USPS Postal Exam Prep ships an update every 3 weeks, and EPA 608 Practice Test & Prep every 3 months. Most recently, USPS Postal Exam Prep was updated on October 25, 2026 and EPA 608 Practice Test & Prep on October 21, 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.*