CDL Prep
CDL Prep Summary
CDL Prep is a free, ad-supported Android app in Education by Jeffrey Diaz. Released in Jun 2014 (12 years ago). It has about 1.5M+ installs and 5.7K ratings with a 4.88★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 14K monthly active users and generates around $<10K monthly revenue (0% IAP / 100% ads). Store last updated Aug 8, 2026
Recent activity: 4.4K installs this week (14K over 4 weeks) showing above average growth , and 6.00 new ratings this week View trends →
SDK intelligence: AppGoblin detected 1 ad networks(e.g. Google), 1 mediation, 1 development tools,and 1 analytics: product integrated into CDL Prep. View full SDK list →
Data tracking: The app's network data flows (API traffic to/from the app and its SDKs) were last crawled on Aug 14, 2025.
CDL Prep SDKs Summary
CDL Prep was last scanned for SDKs on 2026-07-05. Below is the overview of third-party companies detected in the app. The full list of SDKs, permissions and unknowns is available here.
Google
AdMob
Firebase4.88★
Ratings: 5.7K
Screenshots
App Description
Pass your state General Knowledge CDL exam with the help of 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.
5. Performance tracking - Review your performance on every question. Red = You have an average score less than 70%, Orange = You have an average score between 70-89%, Green = You have an average score of 90% and above.
Please send any feedback or request to: CDLPrepApp@gmail.com. Thank you and good luck on your exams!