# AST Study Guide 4th Edition vs CST Exam Prep & Practice Test

The clearest difference is price: CST Exam Prep & Practice Test at Free against AST Study Guide 4th Edition's $65.00. AST Study Guide 4th Edition's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

CST Exam Prep & Practice Test is free to download; AST Study Guide 4th Edition costs $65.00 up front. CST Exam Prep & Practice Test sells 3 in-app purchases, starting at $8.99 per 7 days. AST Study Guide 4th Edition asks for nothing beyond the download.

AST Study Guide 4th Edition ships an update every 2 weeks, CST Exam Prep & Practice Test every 3 months. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | AST Study Guide 4th Edition | CST Exam Prep & Practice Test |
| --- | --- | --- |
| Price | $65.00 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Paid | — |
| Size | 27 MB | 40 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Association of Surgical Techologists](https://appshunter.io/developer/645664784) | [Yahya Al Tamari](https://appshunter.io/developer/1844916998) |

## What reviewers say

### AST Study Guide 4th Edition

[App page](https://appshunter.io/ios/app/ast-study-guide-4th-edition/id6745573067)

Prepare for your Surgical Technology certification exam with a comprehensive study guide. Review essential concepts, practice with over 2,000 realistic questions, and build confidence for exam day through flexible study options.

**Highlights:** Detailed content review of core curriculum, Over 2,000 practice questions, 5 certifying practice exams, Focused or randomized study modes, Easy-to-use format for efficient studying, Familiarity with exam question formats

**Features:** macOS Compatibility

**In-app purchases:** none


### CST Exam Prep & Practice Test

[App page](https://appshunter.io/ios/app/cst-exam-prep-and-practice-test/id6756935043)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription | $8.99 | per 7 days |
| Premium Subscription | $8.99 | per 7 days |
| Premium Subscription | $124.99 | per year |


## Frequently asked questions

### Is AST Study Guide 4th Edition free?

AST Study Guide 4th Edition costs $65.00, with no in-app purchases.

### Is CST Exam Prep & Practice Test free?

CST Exam Prep & Practice Test is free to download, with in-app purchases available.

### Do AST Study Guide 4th Edition or CST Exam Prep & Practice Test have ads?

CST Exam Prep & Practice Test shows ads; AST Study Guide 4th Edition does not.

### Which is updated more often, AST Study Guide 4th Edition or CST Exam Prep & Practice Test?

AST Study Guide 4th Edition ships an update every 2 weeks, and CST Exam Prep & Practice Test every 3 months. Most recently, AST Study Guide 4th Edition was updated on October 16, 2026 and CST Exam Prep & Practice Test on October 14, 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.*