CDL Prep v9.9

Jeffrey Diaz

Contains ads

About this app

Developer Description

Pass your state General Knowledge CDL exam with the help of CDL Prep.

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!

What's New

Minor bug fixes and grammatical corrections.

Version Information

Version: 9.9
Downloads: 1M+
Updated on: Jan 1, 2026
Released: Jun 11, 2014
Requires: Android 6.0

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CDL Prep - Google Play Rankings

Rank	Country	Category	List	Change
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No ranking data available yet. Rankings are updated daily.

#127 in Top Free Education in United States

#126

NeuroNation - Brain Training

#127

CDL Prep

#128

Stimuler AI: English Fluency

CDL Prep users say on Google Play

★★★★★

Frankie Breceda

most people complain about the ads but as soon as they pop up you can literally swipe back or press the back button and they go away right away you dont need to watch them for 30secs like most other ads not even 1 sec. this helped prepare me for my cdla tankers,air brakes,combination and I aced all of them all with using this app to practice highly recommend.

★★★★

Juan Buenrostro

I would have given this a 5 but it lacks one important feature to help retain the information it doesnt tell why that answer is correct or an explanation also going over the questions you answered wrong a few more times other than just starting over would also be helpful.

★★★

Lisa Gould

CDL Recertification. Went to PennDot- PA today to renew my endorsement. I have been taking the exam mode on this app to help keep me fresh with up to date questions . The questions that are on this app are not on the exam at PennDot.

★★

Dann Dan

app is good, but not the ads..im aware tht most apps have ads, but this app only pushes out porn ads which is ridiculous and disgusting especially if im studying in public and its not like i can skip the ad immediately i have to wait 10 or 15 insane seconds to skip please fix that and stop pushing inappropriate ads

★