CDL Hazmat Prep 2026
Pass H Endorsement — DOT Tools
Only for iPhone
Free · In‑App Purchases · Designed for iPhone
iPhone
NEW: Exam Simulator with 5 test modes. Flashcard decks for all 9 hazard classes. Hazmat Math Tools. Emergency Response Guide. Updated for 2026 FMCSA rules.
The CDL hazmat endorsement test covers all 9 hazard classes, placarding rules, loading procedures, and emergency response — and you need 80% to pass. CDL Hazmat Prep gives you 1,000+ practice questions based directly on 49 CFR Parts 171–180, the same federal regulations FMCSA tests you on.
DOT Placard Guide covers all 9 hazard classes with divisions, threshold quantities, and special provisions. This is the reference material you'll use on the exam AND on the road. Match Class 1 Explosives through Class 9 Miscellaneous — with every division, placard color, and UN number format explained.
Every question includes a detailed explanation tied to the specific CFR section so you understand the rule, not just the answer. When you miss a question, the app tells you exactly which regulation covers it and why the correct answer is what it is.
Exam Simulator puts you under real test pressure. Five exam modes: Hazmat General Knowledge, Hazmat Operations, Emergency Response, Tanker Endorsement, and Full H/N/X Combo. 30 questions, 80% pass threshold, timed, with per-category scoring breakdown showing exactly where you're strong and where you need work.
Flashcard Decks for quick study anywhere: Hazard Classes, Placarding Rules, Shipping Papers, Loading & Segregation, Emergency Response, and Tanker Operations. Swipe through during downtime at the terminal or truck stop.
Hazmat Math Tools built for the job: placard weight threshold calculator, tank capacity and outage calculator, safe following distance calculator, and DOT fine estimator. Real tools you'll use after the exam too.
Emergency Response Guide based on ERG procedures: incident response steps, CHEMTREC contact info (800-424-9300), isolation distances for major hazard classes, fire response protocols, and driver responsibilities at a scene. The reference you hope you never need but must know cold for the exam.
Smart practice targets your weak areas automatically. The app tracks which categories you're struggling with and serves those questions more often. No more wasting time on topics you've already mastered.
Study at the terminal, in the sleeper, at the truck stop, or at the loading dock — works 100% offline. No signal needed. No data burned.
VoltExam Pass Promise: Study for 30+ days, complete 80% of questions with a 75%+ average, take at least 1 mock exam. If you don't pass, we'll refund you. That's not 3 extra months of a subscription like other apps — that's your money back.
PRO — LIFETIME ACCESS: Unlimited questions, all exam simulator modes, every flashcard deck, every math tool, full ERG reference, smart weak-area practice, Pass Promise coverage. One payment. No subscriptions. No renewals.
A hazmat endorsement means higher pay per mile. This app costs less than a single fuel stop. Stop guessing and start studying with the tool built for the cab.
Download now. Pass your CDL Hazmat Endorsement the first time.
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Ratings & Reviews
Major Update
- 5-tab redesign: Study Hub, Tools Hub, Reference Hub, Progress Hub, Settings
- Exam Simulator: 5 timed modes (General, Operations, Emergency, Tanker, Full H/N/X)
- 6 flashcard decks — swipe through at the terminal or truck stop
- Hazmat math tools: placard weight, tank capacity, following distance, DOT fines
- Emergency Response Guide with ERG procedures and CHEMTREC info
- DOT Regulations Reference: 49 CFR quick-access
- Study streaks, exam countdown, category mastery tracking
- VoltExam Pass Promise: study seriously and don't pass? Full refund.
The developer, Deeun Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
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Information
- Seller
- Deeun Inc.
- Size
- 5.1 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Hazmat Prep Pro Monthly $6.99
- Hazmat Endorsement Pro $17.99
- Copyright
- © 2026 Deeun Inc.