# 2391 Inspection & Testing Pro vs CDL General Knowledge Prep 26

The clearest difference is in-app purchases: 2391 Inspection & Testing Pro at none against CDL General Knowledge Prep 26's 4. 2391 Inspection & Testing Pro also leads on ads (none vs shown). CDL General Knowledge Prep 26's advantage is iOS requirement (13.0 vs 16.0). On price and device support there is nothing between them.

Both are free to download. CDL General Knowledge Prep 26 sells 4 in-app purchases, starting at $4.99 per 7 days. 2391 Inspection & Testing Pro asks for nothing beyond the download.

## The numbers

| Metric | 2391 Inspection & Testing Pro | CDL General Knowledge Prep 26 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 95.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | — |
| Monetization | Paid | — |
| Size | 61 MB | 24 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eknath Kadam](https://appshunter.io/developer/465355268) | [Mert Demir](https://appshunter.io/developer/1864769723) |

## What reviewers say

### 2391 Inspection & Testing Pro

[App page](https://appshunter.io/ios/app/2391-inspection-and-testing-pro/id307859563)

Prepare for your PCV (Bus/Coach) theory test with over 970 official DVSA revision questions. Study by topic, take mock tests, and review detailed results to track your progress and identify weak areas.

**Highlights:** 970+ official DVSA revision questions, Study by topic, Mock test simulation, Detailed test results with email option, Highway Code e-book reader, Progress meter with pie chart, Randomized questions

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

**In-app purchases:** none


### CDL General Knowledge Prep 26

[App page](https://appshunter.io/ios/app/cdl-general-knowledge-prep-26/id6759219235)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro | $4.99 | per 7 days |
| Monthly Pro | $9.99 | per month |
| Quarterly Access | $19.99 | per 3 months |
| Yearly Access | $39.99 | per year |


## Frequently asked questions

### Is 2391 Inspection & Testing Pro free?

2391 Inspection & Testing Pro is free to download, with no in-app purchases.

### Is CDL General Knowledge Prep 26 free?

CDL General Knowledge Prep 26 is free to download, with in-app purchases available.

### Do 2391 Inspection & Testing Pro or CDL General Knowledge Prep 26 have ads?

CDL General Knowledge Prep 26 shows ads; 2391 Inspection & Testing Pro does not.

---

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