CDL Prep is made and published by Jeffrey Diaz. AppBrain is an independent app data site and isn't affiliated with Jeffrey Diaz. The app name, icon, screenshots and description belong to Jeffrey Diaz and are shown as published on the App Store.
AppBrain's verdict
EstablishedLoved by users- Best rank
- #78
- Top Free, Iran
- Rating on App Store
- 4.68
- 6,967 ratings
- Last updated
- August 9, 2026
Users love it: 4.7 stars from 6,967 ratings. Its best ranking is #78 in Top Free, Education in Iran.
Rankings
App Store top charts- Highest rank
- #78
- Chart
- Top Free
- Education
- Country
- Iran
App Store Rankings for CDL Prep
Top rankings
| Rank | Country | Category | List |
|---|---|---|---|
| 83 | United States | Education | Top Free |
| 78 | Iran | Education | Top Free |
Ranking history in United States
Competitors
Similar apps and more from Jeffrey DiazAlternatives to CDL Prep
Releases
Updates seen on the App Store- Version
- 9.13
- Launched
- April 2016
No changelog data
User feedback
Ratings and reviews on the App StoreComments on CDL Prep for iOS
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Technology
Found in the app by AppBrain- Price
- Free
- App size
- 6.48 MB
- Content rating
- Everyone
Technologies used by CDL Prep
About the app and developer
About CDL Prep
CDL Prep is an education app developed by Jeffrey Diaz.
User Ratings
CDL Prep is rated 4.68 out of 5 stars. The rating is based on 7 thousand ratings.
App Information
CDL Prep is freely available from the App Store. The app size is 6.48 MB. The latest version available is 9.13. The last update was on August 9, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since April 2016.
Developer information for Jeffrey Diaz
Address:
Store listing
By Jeffrey Diaz, from the App Store
Description by Jeffrey Diaz Written by the developer, not by AppBrain. Click to read.
Features:
1. Over 500 questions to practice with.
2. Exam Mode - 60 minutes to answer 50 randomly chosen questions, or 40 minutes to answer 20 to 30 questions on endorsement topics. At the end, review your score and any incorrect answers.
3. Practice Mode - Answer questions and receive instant feedback if you answered incorrectly.
4. Answer Randomization - Answers to questions will not always be in the same position.
Please send any feedback or request to: CDLPrepApp@gmail.com. Thank you for reading, and good luck on your exams!