Prepare for your Commercial Drivers License exams with a comprehensive question bank covering general knowledge and various endorsements. Practice with timed exams or instant feedback modes to identify areas for improvement.
Summarized from real user reviews of CDL Prep. Based on 6.7K reviews and a 4.7/5 average, it highlights the 5 positives and 4 negatives reviewers mention most about this Education app.
9.13
August 9, 2026
Minor bug fixes and grammatical corrections.
2 issues
Back button issues
Incorrect answers in app
3 requests
Ad-free version
Ability to report incorrect questions
CDL Prep is a mobile application designed to help users study for their Commercial Drivers License (CDL) exams. It offers a large question bank covering general knowledge and specific endorsement topics to aid in preparation.
The app covers General Commercial knowledge, as well as specific endorsement topics including Air Brakes, Combinations, Hazmat, Passenger, Tanks, School Bus, and Doubles/Triples.
In Practice Mode, you can answer questions and receive immediate feedback on whether your answer was correct. This allows you to learn from mistakes as you go and reinforce your knowledge.
Yes, the application is free to use. It is supported by advertisements, which are displayed within the app.
CDL Prep offers an Exam Mode that simulates the real test experience. You can choose a 60-minute exam with 50 random questions or shorter exams focused on specific endorsement topics, with timed limits.
