# AST CST Test Prep 2026 vs CDL Prep

The clearest difference is monetization model: CDL Prep at free with in-app purchases against AST CST Test Prep 2026's subscription. CDL Prep also leads on review sentiment (33% vs 0%). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. AST CST Test Prep 2026 sells 3 in-app purchases, starting at $5.99 per 7 days and CDL Prep sells 3 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for AST CST Test Prep 2026 against 4.7 for CDL Prep. Both are backed by a comparable volume of ratings — 80 and 186 respectively. Written reviews are what separate them: 0% of AST CST Test Prep 2026's written reviews are positive against 33% of CDL Prep's.

AST CST Test Prep 2026 ships an update every 5 months, CDL Prep every 4 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | AST CST Test Prep 2026 | CDL Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (80 ratings)](https://appshunter.io/ios/app/ast-cst-test-prep-2026/id6449639659/reviews) | **[4.7 (186 ratings)](https://appshunter.io/ios/app/cdl-prep-practice-test-2026/id6478266679/reviews)** |
| Number of ratings | 80 | **186** |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 months** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 68 MB | 50 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [秀娟 周](https://appshunter.io/developer/1670536523) | [Chutima Busaraprapakul](https://appshunter.io/developer/1706710113) |

## What reviewers say

### AST CST Test Prep 2026

[App page](https://appshunter.io/ios/app/ast-cst-test-prep-2026/id6449639659)

Prepare for your Surgical Technologist certification exam with over 900 practice questions and detailed explanations. This app offers multiple test modes and performance tracking to help you study efficiently and confidently pass your CST exam.

**Highlights:** Over 900 practice questions, Detailed answer explanations, Multiple test modes, Subject classification, Performance tracking, User-friendly interface

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AST CST Premium (1 Week) | $5.99 | per 7 days |
| CST Prep Premium (1 Month) | $17.99 | per month |
| AST CST Premium (3 Months) | $39.99 | per 3 months |


### CDL Prep

[App page](https://appshunter.io/ios/app/cdl-prep-practice-test-2026/id6478266679)

Prepare for your Commercial Driver's License (CDL) exam with practice tests and expert-designed content. This app offers a scientific study system, simulated exams, and detailed explanations to boost your confidence and help you pass on your first attempt.

**Highlights:** Scientific study system, 2,200+ practice questions, Detailed explanations, Simulated exams, Categorized by exam subjects, AI-powered tracking and analysis

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Weekly) | $5.99 | per 7 days |
| Premium (Monthly) | $17.99 | per month |
| Premium (Lifetime) | $99.99 | one-time |


## Frequently asked questions

### Is AST CST Test Prep 2026 free?

AST CST Test Prep 2026 is free to download, with in-app purchases available.

### Is CDL Prep free?

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

### Which has better reviews, AST CST Test Prep 2026 or CDL Prep?

CDL Prep is rated higher. AST CST Test Prep 2026 averages 4.7 out of 5 from 80 ratings, while CDL Prep averages 4.7 from 186 ratings.

### Do AST CST Test Prep 2026 or CDL Prep have ads?

Neither AST CST Test Prep 2026 nor CDL Prep shows ads.

### Which is updated more often, AST CST Test Prep 2026 or CDL Prep?

AST CST Test Prep 2026 ships an update every 5 months, and CDL Prep every 4 months. Most recently, AST CST Test Prep 2026 was updated on October 24, 2026 and CDL Prep on October 24, 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.*