# CDL Prep Pro vs CDL HazMat Endorsement Prep

The clearest difference is update cadence: CDL HazMat Endorsement Prep at every 8 days against CDL Prep Pro's every 5 weeks. CDL HazMat Endorsement Prep also leads on iOS requirement (13.0 vs 15.1). CDL Prep Pro's advantage is device support. On price and in-app purchases there is nothing between them.

Both are free to download. CDL Prep Pro sells 1 one-off in-app purchase and CDL HazMat Endorsement Prep sells 4 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

CDL Prep Pro ships an update every 5 weeks, CDL HazMat Endorsement Prep every 8 days. The most recent releases landed on October 3, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | CDL Prep Pro | CDL HazMat Endorsement Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cdl-prep-pro-practice-test/id6761301775/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | — |
| Update frequency | Every 5 weeks | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 50 MB | 25 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [MAXWELL TAYLOR BADE](https://appshunter.io/developer/1888765336) | [FLY SKY PTY LTD](https://appshunter.io/developer/1838696534) |

## What reviewers say

### CDL Prep Pro

[App page](https://appshunter.io/ios/app/cdl-prep-pro-practice-test/id6761301775)

Prepare for your Commercial Driver's License exam with over 500 practice questions covering all major CDL sections and state-specific rules. Features smart study tools like automatic review of missed questions and progress tracking to ensure you pass on the first try.

**Highlights:** 500+ practice questions, State-specific rules for all 50 states, Smart Review for missed questions, Progress tracking, Mock exam mode, Instant explanations

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Sections | $19.99 | one-time |


### CDL HazMat Endorsement Prep

[App page](https://appshunter.io/ios/app/cdl-hazmat-endorsement-prep/id6776219751)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CDL HazMat Endorsement Full Ac | $6.99 | per 7 days |
| CDL HazMat Endorsement Full Ac | $16.99 | per month |
| Unlock Full Question Bank | $4.99 | one-time |
| CDL HazMat Endorsement Full Ac | $69.99 | one-time |


## Frequently asked questions

### Is CDL Prep Pro free?

CDL Prep Pro is free to download, with in-app purchases available.

### Is CDL HazMat Endorsement Prep free?

CDL HazMat Endorsement Prep is free to download, with in-app purchases available.

### Which is updated more often, CDL Prep Pro or CDL HazMat Endorsement Prep?

CDL Prep Pro ships an update every 5 weeks, and CDL HazMat Endorsement Prep every 8 days. Most recently, CDL Prep Pro was updated on October 3, 2026 and CDL HazMat Endorsement Prep on October 1, 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.*