What is CDL Prep's rating?

CDL Prep is rated 4.7 stars across 6,353 ratings on the App Store.

CDL Prep is published by Jeffrey Diaz, launched on Apr 14, 2016.

Where does CDL Prep rank in its category?

CDL Prep ranks #1243 of 2884 apps in Education, putting it in the top 43.1% by revenue.

CDL Prep is growing: ratings volume grew 1170.6% over the last 30 days, a useful proxy for active user acquisition.

How much does CDL Prep earn?

Q: How much does CDL Prep earn?

CDL Prep earns approximately 914 per month based on bumetric's ML revenue forecast, calibrated against 2884 comparable iOS apps in Education.

iOS app from Jeffrey Diaz · Education

ML forecast ★ 4.7 · 6K +1170.6% MoM Freemium

~914/mo

ML revenue forecast. Calibrated against 2884 apps in this category.

Confidence band

±15%

High — many comparable apps with verified data

At a glance

Tracks close to the iOS app category median (699/mo).
Ranks #1,243 of 2,884 in Education (top 43.1% by revenue).
Ratings volume grew 1170.6% over the last 30 days, suggesting active user acquisition.
Launched Apr 14, 2016 · last updated Feb 14, 2026.
23 months of snapshot history tracked.

What the app looks like

Live screenshots from the App Store, captured by our snapshot worker. Tap any image to enlarge.

CDL Prep's revenue trajectory

Forecast revenue from snapshot history. Last 23 months.

Where CDL Prep sits in Education

Revenue distribution of 2884 comparable apps. CDL Prep highlighted.

CDL Prep vs comparable apps

Revenue trajectory side-by-side. Bold = CDL Prep, ghosted = peers.

App spec

Version

9.10

Last update

Feb 14, 2026

Launched

Apr 14, 2016

Min OS

15.0

Rating

Price

Free

Monetization

Freemium

Languages

What CDL Prep actually does (from App Store listing)

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…

Read full description →

🆕 What's new · v9.10

Minor bug fixes and performance improvements.

Comparable iOS apps

The five apps in Education with the closest revenue to CDL Prep. Click any to see its detail page.

App	Revenue	Rating	Ratings
50 US states - Quiz	913	★ 4.8	6K
Deutsch Test A1 A2 B1 Prüfung	915	★ 4.7	451
ClassLink LaunchPad	915	★ 4.2	7K
GED & Me™	911	★ 4.8	8K
Einbürgerungstest : 2026	911	★ 4.3	6

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How we calculated this

Each forecast combines App Store rating, ratings count, monetisation model, pricing tier, IAP signals and ad-supported flag. The base estimate is then multiplied by a per-category scaling factor learned from apps with founder-verified MRR. Every number on this page comes from public APIs and bumetric's own snapshot history.

Full methodology covers input variables, accuracy bands per category and how we treat apps without comparable anchors. See also the live data on CDL Prep's tracker page for current rating, reviews and snapshot timeline.

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