# CDL Prep — Commercial Drivers License > Commercial Drivers License exam preparation app with practice tests. (iPhone/iPad app by Jeffrey Diaz.) - Source: https://appshunter.io/ios/app/cdl-prep/id1101536521 (this page in markdown: same URL + `.md`) - Developer: [Jeffrey Diaz](https://appshunter.io/developer/1101536520) - Category: Education - Price: Free - Rating: 4.70/5 from 6,708 App Store ratings · 528 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 6 MB - Languages: American English - Released: 2016-04-14 - Data updated: 2026-08-27 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/cdl-prep/id1101536521/reviews.md ## What is 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. Please send any feedback or request to: CDLPrepApp@gmail.com. Thank you for reading, and good luck on your exams! ## Key features - Over 500 practice questions - Timed exam mode - Endorsement topic exams - Instant feedback in practice mode - Randomized answer order ## Chart rankings - #113 in Top Free · Education (US App Store) ## What do users think of CDL Prep? Overall sentiment: positive **Pros** - 🚀 Accurate questions - 👍 Helpful for passing tests - 💯 Exactly like real test - 🙌 Great study tool - ✅ Passed on first try **Cons** - 🔍 Some questions not on app - 🔢 Too many ads - 🔀 Can't close ads - 🤔 Inconsistent answers **Commonly reported bugs** - Back button issues - Incorrect answers in app **Most requested features** - Ad-free version - Ability to report incorrect questions - Include state-specific requirements ## Recent user reviews (10 of 528) All indexed reviews: https://appshunter.io/ios/app/cdl-prep/id1101536521/reviews.md ### 3/5 — Ok - Annoying *2026-08-14, version 9.13* The app is not bad, the questions for CDL are pretty spot on. The only issue I’m finding, is far too many ads. I’ve actually begun looking for a different one to avoid them. It’s usually between every 5-10 questions so do you go through each one fast, you see them more. There needs to be a remove ads option. ### 5/5 — Passed first try *2026-08-14, version 9.13* Passed first try only using this app ### 5/5 — Perfect *2026-08-13, version 9.13* Read the manual then do this it’s perfect ### 5/5 — Best Cdl Practice App *2026-08-13, version 9.13* The same exact questions on the written exam at your local DMV is in this app, I passed general knowledge and air brakes after using this app as my study guide. ### 5/5 — Great help *2026-08-13, version 9.13* Even though I have passed three different endorsements and CDL, I still use this as a reference and keep burning the information in my head ### 5/5 — Best app for anyone trying to get their CDL *2026-08-12, version 9.13* This has been the most helpful app out there. I studied this app only and passed my test on the first try highly recommend. ### 5/5 — ‼️Best App For CA CDL *2026-08-10, version 9.13* Used this app for hours studying, very helpful and understanding. They had almost the exact same questions as the written test. Would absolutely recommend to anyone looking for a reliable app for the permit. ### 5/5 — Cdl *2026-08-08, version 9.12* Great app it’s sure to help you pass those test seriously ### 2/5 — I failed *2026-08-08, version 9.12* For the hazmat portion it is missing important questions I failed ### 5/5 — Best app *2026-08-07, version 9.12* This app is the best for get cdl ## Frequently asked questions about CDL Prep ### What is CDL Prep? 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. ### What topics are covered in CDL Prep? The app covers General Commercial knowledge, as well as specific endorsement topics including Air Brakes, Combinations, Hazmat, Passenger, Tanks, School Bus, and Doubles/Triples. ### How does the practice mode work? 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. ### Is CDL Prep free to use? Yes, the application is free to use. It is supported by advertisements, which are displayed within the app. ### What are the exam modes available? 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. ## Version history (last 5 releases) ### 9.13 — 2026-08-09 Minor bug fixes and grammatical corrections. ### 9.12 — 2026-06-20 Minor bug fixes and grammatical corrections. ### 9.11 — 2026-05-16 Minor bug fixes and performance improvements. ### 9.10 — 2026-02-14 Minor bug fixes and performance improvements. ### 9.9 — 2026-01-02 Minor bug fixes and grammatical corrections. ## Apps similar to CDL Prep | App | Rating | Price | Category | | --- | --- | --- | --- | | [DMV Genie: Permit Test 2026](https://appshunter.io/ios/app/dmv-genie-permit-test-2026/id513850893) | 4.8 (183,185) | Free | Education | | [DMV Practice Test 2026 \| Max](https://appshunter.io/ios/app/dmv-practice-test-2026-max/id1632676352) | 4.8 (7,657) | Free | Education | | [CDL Prep Practice Test Genie](https://appshunter.io/ios/app/cdl-prep-practice-test-genie/id1447415467) | 4.8 (14,285) | Free | Education | | [DMV Permit Practice Test: Luma](https://appshunter.io/ios/app/dmv-permit-practice-test-luma/id6446089648) | 4.8 (4,188) | Free | Education | | [Zutobi: Permit & Driving Prep](https://appshunter.io/ios/app/zutobi-permit-and-driving-prep/id1394069110) | 4.7 (236,049) | Free | Education | | [DMV Permit Practice Test 2026°](https://appshunter.io/ios/app/dmv-permit-practice-test-2026/id6498894331) | 4.7 (131) | Free | Education | ## More apps by Jeffrey Diaz - [Team Dominoes](https://appshunter.io/ios/app/team-dominoes/id1467672275) All apps by Jeffrey Diaz: https://appshunter.io/developer/1101536520 ## Related topics [cdl](https://appshunter.io/ios/topics/cdl) · [cdl exam](https://appshunter.io/ios/topics/cdl-exam) · [cdl practice test mva](https://appshunter.io/ios/topics/cdl-practice-test-mva) · [cdl practice test marylands](https://appshunter.io/ios/topics/cdl-practice-test-marylands) · [cdl practice test class](https://appshunter.io/ios/topics/cdl-practice-test-class) · [cdl prep](https://appshunter.io/ios/topics/cdl-prep) · [cdl practice test](https://appshunter.io/ios/topics/cdl-practice-test) · [free cdl practice test](https://appshunter.io/ios/topics/free-cdl-practice-test) · [cdl practice test pro](https://appshunter.io/ios/topics/cdl-practice-test-pro) · [cdl hazmat practice test](https://appshunter.io/ios/topics/cdl-hazmat-practice-test) · [cdl test knowledge](https://appshunter.io/ios/topics/cdl-test-knowledge) · [cdl prep test practice](https://appshunter.io/ios/topics/cdl-prep-test-practice) · [cdl prep test study](https://appshunter.io/ios/topics/cdl-prep-test-study) · [cdl prep jeffrey diaz](https://appshunter.io/ios/topics/cdl-prep-jeffrey-diaz) · [cdl prep free](https://appshunter.io/ios/topics/cdl-prep-free) · [arkansas cdl test prep](https://appshunter.io/ios/topics/arkansas-cdl-test-prep) · [texas cdl permit practice test](https://appshunter.io/ios/topics/texas-cdl-permit-practice-test) · [jeffrey diaz](https://appshunter.io/ios/topics/jeffrey-diaz) · [cdl prep 2026](https://appshunter.io/ios/topics/cdl-prep-2026) · [cdl test prep 2026 edition](https://appshunter.io/ios/topics/cdl-test-prep-2026-edition) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*