Pass your state General Knowledge CDL exam with the help of CDL Prep.
4.57·5,393 reviews·1,000,000+ downloads
About CDL Prep
CDL Prep is an education app developed by Jeffrey Diaz.
Download Statistics
CDL Prep has been downloaded 1.4 million times. In the last 30 days, the app was downloaded 13 thousand times.
User Ratings
CDL Prep is rated 4.57 out of 5 stars. The rating is based on 5.4 thousand ratings.
App Information
CDL Prep is FREE to download. The APK download size is 9.35 MB. The latest version available is 9.12. The last update was on June 19, 2026.
Technical Requirements
CDL Prep requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play June 2014.
Description
CDL Prep is the best way to prepare for the Commercial Drivers License General Knowledge, and various endorsement exams. CDL Prep contains questions on the following topics: General Commercial, Air Brakes, Combinations, Hazmat, Passenger, Tanks, School Bus, and Doubles/Triples.
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.
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Best app for cdl permit all the questions you see in this app they come out on test only very few there were not. Pass with a 100% general knowledge, combinations,air breaks thanks for being so accurate with the questions.there are alot of apps that the questions they give you don't come out on the test will recommend this app to everyone. Thank you guys for provide me we such a great tool.👍🎉 I recently relocated to another state, and I had to retake the Hazmat endorsement pass with 100% best app
★★★★★Farrel Owens· May 7, 2026
Awesome app! I passed all my exams first try just from using this app!
★★☆☆☆Murilo Antunelli· Jun 19, 2026
Almost failed my hazmat after nailing 100% a dozen times on the app. It needs to cover more questions or be updated.
★☆☆☆☆Yah Carter· Jun 5, 2026
Please don't use this app they have several wrong answer example your eyes see hazard to the time the brain knows that this is a hazard is incorrect the answer is The brain tell the foot... like y'all cause me to fail my test at motor vehicle
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