# CDL Prep vs RandyAI

The clearest difference is in-app purchases: CDL Prep at none against RandyAI's 2. CDL Prep also leads on ratings volume (6.7K vs 5) and chart position (#87 vs unranked). RandyAI's advantage is ads (none vs shown) and rating (5.0 vs 4.7). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. RandyAI sells 2 in-app purchases, starting at $4.99 per month. CDL Prep asks for nothing beyond the download.

RandyAI holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: CDL Prep has 6.7K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 81% of CDL Prep's written reviews are positive against 100% of RandyAI's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 24, 2026 and August 1, 2026 respectively.

## The numbers

| Metric | CDL Prep | RandyAI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (6.7K ratings)](https://appshunter.io/ios/app/cdl-prep/id1101536521/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/randyai/id6752505326/reviews)** |
| Number of ratings | **6.7K** | 5 |
| Positive reviews | 80.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Ad-supported** | Freemium |
| Best chart rank | **#87** | — |
| Size | 6 MB | 41 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Jeffrey Diaz](https://appshunter.io/developer/1101536520) | [RenAIssance Labs, LLC](https://appshunter.io/developer/1839570709) |

## What reviewers say

### CDL Prep

[App page](https://appshunter.io/ios/app/cdl-prep/id1101536521)

**Currently charting:** #87 Top Free · Education (US App Store)

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.

**Highlights:** Over 500 practice questions, Timed exam mode, Endorsement topic exams, Instant feedback in practice mode, Randomized answer order

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Accurate questions
- 👍 Helpful for passing tests
- 💯 Exactly like real test
- 🙌 Great study tool
- ✅ Passed on first try

**What reviewers complain about**

- 🔍 Some questions not on app
- 🔢 Too many ads
- 🔀 Can't close ads
- 🤔 Inconsistent answers

**Reported bugs**

- Back button issues
- Incorrect answers in app

**Requested features**

- Ad-free version
- Ability to report incorrect questions
- Include state-specific requirements


### RandyAI

[App page](https://appshunter.io/ios/app/randyai/id6752505326)

This app helps water and wastewater professionals prepare for certification exams and understand plant operations. It offers state-specific practice questions, an AI-powered study assistant for complex topics, and troubleshooting support for equipment. Learn and retain critical concepts with interactive lessons and quizzes, accessible offline.

**Highlights:** State-specific exam preparation, AI-powered study assistant, Troubleshooting support for plant operations, Interactive lessons and quizzes, Offline mobile learning, Operator-developed content

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Randy Pro - Monthly | $4.99 | per month |
| Randy Pro - Yearly | $44.99 | per year |


## Frequently asked questions

### Is CDL Prep free?

CDL Prep is free to download, with no in-app purchases.

### Is RandyAI free?

RandyAI is free to download, with in-app purchases available.

### Which has better reviews, CDL Prep or RandyAI?

RandyAI is rated higher. CDL Prep averages 4.7 out of 5 from 6.7K ratings, while RandyAI averages 5.0 from 5 ratings.

### Do CDL Prep or RandyAI have ads?

CDL Prep shows ads; RandyAI does not.

### Which is updated more often, CDL Prep or RandyAI?

CDL Prep ships an update every 2 months, and RandyAI every 2 months. Most recently, CDL Prep was updated on September 24, 2026 and RandyAI on August 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*