CDL Prep

Name: CDL Prep
Rating: 4.7 (6602 reviews)
Author: Jeffrey Diaz

By: Jeffrey Diaz App

Commercial Drivers License

Overview

Version:

9.12

Last updated: 2026-06-20

Features & Capabilities

CDL Prep helps you study for the Commercial Driver's License with 500+ practice questions covering General Knowledge and common endorsements (Air Brakes, Hazmat, Passenger, Tanks, School Bus, Doubles/Triples).

It offers Exam Mode and Practice Mode, with features like 60-minute exams for 50 questions or 40-minute exams for 20–30 endorsement questions, instant feedback on answers, and randomized answer order. At the end you can review your score and incorrect responses. For feedback or requests, contact CDLPrepApp@gmail.com.

User Growth & Download Statistics

App Education

By:

Jeffrey Diaz

Rating:

4.70

(6,602) 40 new ratings

Version:

9.12 Last updated: 2026-06-20

Version code:

887212806

Creation date:

2016-04-14

Compatible devices:

Size:

6.47MB

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-07-19

Compare stats and ranking:

Ranking

# 22,813 ▲ 54

Other rankings

#14 in license keyword 3 ▲ 2

Other platforms

CDL Prep (v9.12)

1,439,398 4.59

(5,623)

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Jeffrey Diaz

Apple Apps Store

https://apps.apple.com/us/app/cdl-prep/id1101536521

Website:

https://www.jeffreydiaz.com

User Reviews

CDL Prep is widely praised for helping users pass CDL written tests and for questions that align with real exams, plus strong endorsement coverage and free access. The main downsides are intrusive ads and occasional content issues (inaccuracies and outdated state content) with gaps in some endorsements. Overall, it's an effective, value-focused study tool for many, but users notice room for content updates and ad relief.

Pros

Helps users pass CDL tests, with many reporting first-time pass results.
Practice questions closely mirror real exams, including General Knowledge, Air Brakes, and other areas.
Covers multiple endorsements (hazmat, tanker, doubles/triples, passenger) aiding in earning endorsements.
Free, ad-supported access provides good value and reduces need for paid alternatives.

Cons

Ads are intrusive and can disrupt practice sessions; multiple reviews mention the need to remove or block ads.
Occasional content inaccuracies and outdated material, including hazmat question errors and state-specific updates (Florida GK, New York endorsements).
Gaps in state-specific coverage and endorsement content that some users want updated or expanded.

Recent reviews

Great App very helpful

by Pe*****, 2026-06-29

The question regarding empty trucks vs bobtail and longer stopping distance is wrong. A bobtail will have a longer stopping distance than an empty trailer.