# J. J. Keller Learning Center vs CristCDL.com Practice Test CDL

The clearest difference is rating: J. J. Keller Learning Center at 2.6 against CristCDL.com Practice Test CDL's 1.7. J. J. Keller Learning Center also leads on ads (none vs shown) and monetization model (free vs ad-supported). CristCDL.com Practice Test CDL's advantage is review sentiment (16% vs 0%) and ratings volume (130 vs 16). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

J. J. Keller Learning Center holds the better App Store score, 2.6 against 1.7. That said, the two scores are not equally well evidenced: CristCDL.com Practice Test CDL has 130 ratings behind it against 16, so its average is the more settled of the two. Written reviews complicate that: 0% of J. J. Keller Learning Center's written reviews are positive against 16% of CristCDL.com Practice Test CDL's, so the app with the better star average is not the one people write more warmly about.

J. J. Keller Learning Center ships an update every 2 months, CristCDL.com Practice Test CDL every 5 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | J. J. Keller Learning Center | CristCDL.com Practice Test CDL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (16 ratings)](https://appshunter.io/ios/app/j-j-keller-learning-center/id1535852395/reviews)** | [1.7 (130 ratings)](https://appshunter.io/ios/app/cristcdlcom-practice-test-cdl/id6738142291/reviews) |
| Number of ratings | 16 | **130** |
| Positive reviews | 0.0% of reviews | **15.9% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | **Free** | Ad-supported |
| Size | 112 MB | 8 MB |
| Requires iOS | **15.4** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [J. J. Keller & Associates, Inc.](https://appshunter.io/developer/684247627) | [William Crist](https://appshunter.io/developer/1779566537) |

## What reviewers say

### J. J. Keller Learning Center

[App page](https://appshunter.io/ios/app/j-j-keller-learning-center/id1535852395)

Access essential safety and health training courses on your mobile device. Download courses for offline access and easily communicate with your trainer. A guide is available for new learners to help navigate the platform.

**Highlights:** On-the-go access to training, Offline course downloads, Direct messaging to trainers, Guide for new learners, Immediate access after login

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

**In-app purchases:** none


### CristCDL.com Practice Test CDL

[App page](https://appshunter.io/ios/app/cristcdlcom-practice-test-cdl/id6738142291)

Prepare for your Commercial Driver's License (CDL) exams with state-specific practice tests. Access a comprehensive question bank, including specialized endorsements, and receive immediate feedback with explanations for each answer. Download your state manual for further study.

**Highlights:** State-specific practice tests, General Knowledge tests, Endorsement tests (Air Brakes, Tanker, etc.), Pre-Trip Inspection tests and videos, Immediate answer feedback with explanations, Downloadable state CDL manuals

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

**In-app purchases:** none


## Frequently asked questions

### Is J. J. Keller Learning Center free?

J. J. Keller Learning Center is free to download, with no in-app purchases.

### Is CristCDL.com Practice Test CDL free?

CristCDL.com Practice Test CDL is free to download, with no in-app purchases.

### Which has better reviews, J. J. Keller Learning Center or CristCDL.com Practice Test CDL?

J. J. Keller Learning Center is rated higher. J. J. Keller Learning Center averages 2.6 out of 5 from 16 ratings, while CristCDL.com Practice Test CDL averages 1.7 from 130 ratings.

### Do J. J. Keller Learning Center or CristCDL.com Practice Test CDL have ads?

CristCDL.com Practice Test CDL shows ads; J. J. Keller Learning Center does not.

### Which is updated more often, J. J. Keller Learning Center or CristCDL.com Practice Test CDL?

J. J. Keller Learning Center ships an update every 2 months, and CristCDL.com Practice Test CDL every 5 months. Most recently, J. J. Keller Learning Center was updated on October 20, 2026 and CristCDL.com Practice Test CDL on October 24, 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.*