CDL Prep
Jeffrey Diaz Education iPhoneiPadiPod touch
CDL Prep is a free Education app for iPhone and iPad by Jeffrey Diaz. Rated 4.7/5 from 6,969 ratings. Requires iOS 15.0. Updated August 9, 2026.
- Rating
- 4.7
- 6.9K ratings
- Price
- Free
- on the App Store
- Size
- 6 MB
- Age 4+
- Updated
- Aug 9
- 2026 · v9.13
Screenshots
About 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: [email protected]. Thank you for reading, and good luck on your exams!
Ratings & reviews
4.7
6.9K ratings
What’s new
Version 9.13 · Updated August 9, 2026
Minor bug fixes and grammatical corrections.
App privacy
The developer, Jeffrey Diaz, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location: Coarse Location
- Identifiers: Device ID
- Usage Data: Product Interaction, Advertising Data
- Diagnostics: Crash Data, Performance Data
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Location: Coarse Location
- Identifiers: Device ID
- Usage Data: Product Interaction, Advertising Data
- Diagnostics: Performance Data
Used for: Third-Party Advertising, Analytics
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Diagnostics: Crash Data
Used for: Third-Party Advertising, Analytics
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| CDL Prep | 4.7 / 5 (6,969 ratings) | Free | August 9, 2026 | |
| CDL Test Prep 2026 Class A B | 4.9 / 5 (48,359) | Free | Oct 10, 2026 | Compare |
| CDL Prep - Practice Test 2026 | 4.6 / 5 (3,344) | Free | Jul 13, 2026 | Compare |
| CDL Prep Test 2026: Drivers ed | 4.7 / 5 (7,750) | Free | May 8, 2026 | Compare |
| CDL Permit: Practice Test 2026 | 4.7 / 5 (18,169) | Free | Dec 26, 2025 | Compare |
| CDL Prep Test 2026 | 4.9 / 5 (15,322) | Free | Jul 29, 2026 | Compare |
| CDL Prep Practice Test Genie | 4.8 / 5 (14,459) | Free | Oct 11, 2026 | Compare |
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