Pass your CDL — and every endorsement — on the first try.
Three focused practice apps for the Commercial Driver's License, HazMat and Air Brakes exams. 1,262+ questions, realistic mock tests, and the field tools you'll actually use on the job.
Three apps. One CDL goal.
Each app is laser-focused on one exam — and they're built on the same engine, with the same realistic question format the DMV uses.
CDL Test
Pass your CDL on the first try
Comprehensive practice for the CDL General Knowledge test and all endorsements.
HazMat Test
Master your Hazardous Materials endorsement
Earn your Hazardous Materials (H) endorsement with confidence — including Tank and Doubles/Triples.
Air Brakes Test
Add the Air Brakes endorsement to your CDL
Practice everything on the Air Brakes endorsement test: dual systems, low-air warnings, slack adjusters, and more.
How drivers use Commercial Driver Prep
A simple three-step routine that gets you test-ready in days, not weeks.
Try a quiz here
Pick an exam area on this site and answer 10 free practice questions in your browser. See exactly the kind of questions the DMV will ask.
Download the app
Get the matching mobile app for full access — hundreds more questions, mock tests, flash cards, and offline practice during your breaks.
Pass your test
Hit 80%+ on mock tests, walk into the DMV with confidence, and start your career as a commercial driver.
What drivers are saying
Passed my CDL General Knowledge on the first try after two weeks with this app. The explanations connect every answer back to the CDL Manual — that's why it sticks.
HazMat endorsement was the one I was most worried about. The placarding tool and the ERG reference made the difference. 47/50 on the real test.
I drive a school bus and needed Air Brakes. 13 practice tests, all explained, all free to try. Got the endorsement done in a weekend.
Ready to start practising?
Take a free practice quiz right now — no signup, no download required.