CDL Prep vs KnowledgeVine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CDL Prep
Prepare for your Commercial Drivers License exams with a comprehensive question bank covering general knowledge and various endorsements. Practice with timed exams or instant feedback modes to identify areas for improvement.
- Over 500 practice questions
- Timed exam mode
- Endorsement topic exams
- Instant feedback in practice mode
- Randomized answer order
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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. Please send any feedback or request to: CDLPrepApp@gmail.com. Thank you for reading, and good luck on your exams!
KnowledgeVine
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KnowledgeVine's Mobile app delivers KV Content to Users
Screenshots
Verdict
The clearest difference is ads: KnowledgeVine at none against CDL Prep's shown. CDL Prep's advantage is chart position (#94 vs unranked). On price, update cadence, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 15, 2026 and October 3, 2026 respectively.
| Parameter | CDL Prep | KnowledgeVine |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (6.7K ratings) — better | — |
| Positive reviews | 80.9% of reviews | — |
| Number of ratings | 6.7K — better | — |
| Update frequency | Every 2 months | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Best chart rank | #94 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 6 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Jeffrey Diaz | Knowledge Vine, LLC |
Bugs and requests
CDL Prep
Reported bugs
2 issues- Back button issues
- Incorrect answers in app
Requested features
3 requests- Ad-free version
- Ability to report incorrect questions
- Include state-specific requirements
KnowledgeVine
Not enough reviews yet to summarise bugs or requests.
In-app purchases
CDL Prep
No in-app purchases
KnowledgeVine
No in-app purchases
Questions
Is CDL Prep free?
Is KnowledgeVine free?
Do CDL Prep or KnowledgeVine have ads?
Which is updated more often, CDL Prep or KnowledgeVine?
Other comparisons
