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 Google Play.
AppBrain's verdict
EstablishedPopularLoved by users- Total installs
- 1.5 million
- Best rank
- #128
- Top Free, United States
- Rating on Google Play
- 4.56
- 5,490 ratings
- Last updated
- August 7, 2026
CDL Prep is popular, with 1.5 million installs. Users love it: 4.6 stars from 5,490 ratings.
Installs
Tracked by AppBrain- Last 30 days
- 14 thousand
- Per day
- 450
- 30-day average
- Play install range
- 1+ million
- Launched
- June 2014
Installs over time
CDL Prep has been installed 1.5 million times. Over the past 30 days, it averaged 450 installs per day.
Rankings
Google Play top charts- Highest rank
- #128
- Chart
- Top Free
- Education
- Country
- United States
Google Play Rankings for CDL Prep
Top rankings
| Rank | Country | Category | List |
|---|---|---|---|
| 128 | United States | Education | Top Free |
Ranking history in United States
Competitors
Similar apps and more from Jeffrey DiazAlternatives to CDL Prep
Releases
Updates seen on Google Play- Version
- 9.13
- Launched
- June 2014
User feedback
Ratings and reviews on Google PlayGoogle Play Rating history and histogram
Comments on CDL Prep for Android
Technology
Found in the app by AppBrain- Ads
- Contains ads
- Price
- Free
- Libraries
- 16
- App size
- 9.34 MB
- Needs Android
- 6.0+
- 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.
How many times has CDL Prep been installed?
CDL Prep has been installed 1.5 million times. In the last 30 days, the app was installed 14 thousand times.
What is the rating of CDL Prep?
CDL Prep is rated 4.56 out of 5 stars, based on 5.5 thousand ratings.
Is CDL Prep free?
CDL Prep is free. The app size is 9.34 MB. The latest version available is 9.13. The last update was on August 7, 2026.
What are the requirements for CDL Prep?
CDL Prep requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since June 2014.
App Performance Report
Get a detailed PDF report for CDL Prep with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more
Get PDF Report — $29Developer information for Jeffrey Diaz
Frequently asked questions about CDL Prep
Is CDL Prep free?
Yes. CDL Prep is free on Google Play.
Is CDL Prep still available?
Yes. CDL Prep is on Google Play, and the last update we saw was on August 7, 2026.
Does CDL Prep contain ads?
Yes. Google Play lists CDL Prep as containing ads.
What Android version does CDL Prep require?
CDL Prep runs on Android 6.0 and higher.
How large is CDL Prep?
CDL Prep is 9.34 MB.
Is CDL Prep suitable for children?
Google Play rates the content of CDL Prep as suitable for everyone.
How many times has CDL Prep been installed?
Google Play lists 1,000,000+ installs for CDL Prep.
How do people rate CDL Prep?
CDL Prep scores 4.56 out of 5 stars, from 5,490 ratings on Google Play.
Who made CDL Prep?
CDL Prep was developed by Jeffrey Diaz. It is listed in the education category on Google Play.
What are the best alternatives to CDL Prep?
People looking at CDL Prep also look at these education apps: CDL Test Prep 2026, CDL Driver Permit DMV Test Ed, CDL Pass - Permit Test Prep, CDL Prep 2026: Test Practice, CDL Prep Practice Test 2026.
Store listing
By Jeffrey Diaz, from Google Play“Pass your state General Knowledge CDL exam with the help of CDL Prep.”
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.
5. Performance tracking - Review your performance on every question. Red = You have an average score less than 70%, Orange = You have an average score between 70-89%, Green = You have an average score of 90% and above.
Please send any feedback or request to: CDLPrepApp@gmail.com. Thank you and good luck on your exams!
Recent changes:
Minor bug fixes and grammatical corrections.