Your License. Your Career. Your Future.
Prepare for your CDL written exams with 700 practice questions covering all six test topics. A clear explanation after every answer, and timed mock exams in the real format — 80% to pass, just like test day — so you walk in ready.
Free to try · Pay once, own it forever · No ads, no account
Everything you need to pass. Nothing you don't.
One calm app for the whole CDL. Real exam conditions, and an explanation whenever you need one.
All six topics
General Knowledge, Air Brakes, Combination Vehicles, Doubles & Triples, Tank Vehicles and Hazardous Materials: 700 practice questions with detailed explanations.
Practice by topic
Short, focused quizzes that fit between two trips. Every answer comes with instant feedback and a clear explanation.
Real-format mock exams
The real conditions of test day: a timed exam for each topic, with the same 80% pass mark as the actual CDL tests.
Endorsement topics, covered
Hazardous Materials, tank vehicles, doubles and triples: the endorsement topics that trip up most applicants, explained answer by answer.
Review your mistakes
After every quiz, go back over what you missed and why. Your progress is tracked section by section, so weak spots don't stay weak.
One purchase, yours forever
No subscription, no ads, no expiring trial. Unlock the complete question bank and unlimited mock exams once, and keep them forever.
Three steps. Zero learning curve.
No account, no setup wizard that never ends. Open the app and start studying.
Pick your section
General Knowledge is required for every CDL. Add Air Brakes, Combination Vehicles and the endorsement topics for your license class.
Practice topic by topic
Short quizzes with an explanation after every answer. Fifteen questions per topic are free.
Sit the mock exam
Timed questions, 80% to pass, the real format. When you pass here, you're ready for the real thing.
Free to try. One payment to own.
No subscription. No ads. Pay once, it's yours.
CDL Prep Test Free
Start today — no account, no card.
- ✓ All four exam sections
- ✓ 15 practice questions per topic
- ✓ 1 mock exam per topic
- ✓ Explanation after every answer
- ✓ Adjustable text size
- ✓ Progress tracking and mistake review
- ✓ No ads, no account needed
- ✕ Complete 700-question bank
- ✕ Unlimited mock exams
CDL Prep Test Pro
Billed once through Google Play.
- ✓ All four exam sections
- ✓ Complete question bank: 700 questions
- ✓ HazMat, tanker and doubles & triples, included
- ✓ Unlimited timed mock exams
- ✓ Explanation after every answer
- ✓ Adjustable text size
- ✓ Progress tracking and mistake review
- ✓ No ads, no account needed
- ✓ Pay once — yours forever, no subscription
Your studying stays on your phone.
CDL Prep Test was built for drivers. It treats your data the way it treats you: with respect.
- ✓No account, no sign-up. CDL Prep Test never asks for your name, email, or any identifier.
- ✓Progress stays on your device. Your scores and history are stored locally on your phone and are never uploaded or shared.
- ✓No ads, no trackers. Nothing follows your studying, and there is nothing to sell.
- ✓Purchases handled by Google Play. Pro is verified through RevenueCat with an anonymous identifier. We never see or store your payment information.
Read the full policy: engysgroup.com/cdl/privacy