Android

CDL Prep

CDL Prep has 1,493,063 installs (+1.0% a month, measured over 40 days), rated 4.6 from 5,763 ratings, #1,529 of 325,305 in Education.

View in the Android store ↗
Installs
1,493,063
+2,658 (+0.2%) this week
Rating
4.6
5,763 ratings
+7 ratings (+0.1%) this week
Rank on Android
#47,455
of 2,999,673
down 2,501 since 2026-11-01
Version
9.14
Last updated 2026-10-31

Description

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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!

Is CDL Prep safe?

StoreTally doesn't rate safety. Here's what the store and our tracking show:

  • Listed on Google Play.
  • Made by Jeffrey Diaz; developer website listed: jeffreydiaz.com. Details →
  • On Google Play since 2014-06-12. Last updated 2026-10-31.
  • Rated 4.6 from 5,763 ratings. Details →

Reviews The reviews Google Play shows first (its most relevant), from the US store, in any language.

From 5,757 ratings.

Growth change in installs

Per Growth Growth % Actual change Measured over
day Not enough history yet
week +2,658 +0.2% +2,927 7.7 days
month +14,217 +1.0% +19,001 40.1 days
year Not enough history yet
How these figures are measured

Change in installs, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.

Installs1,493,063
2026-10-01 · 1,483,302 2026-11-10
Ratings5,763
2026-10-01 · 5,736 2026-11-10
New ratings per month+27 so far
Oct 2026 from 2026-10-01: +0 Nov 2026 so far: +27
Oct 1 Nov so far
Average rating4.6
2026-10-01 · 4.6 2026-11-10

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