# AST CST Exam Prep vs Sterile Processing Technician

The clearest difference is ratings volume: AST CST Exam Prep at 284 against Sterile Processing Technician's 12. AST CST Exam Prep also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (13.0 vs 15.0). Sterile Processing Technician's advantage is rating (4.8 vs 4.6) and review sentiment (33% vs 25%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. AST CST Exam Prep sells 2 in-app purchases, starting at $24.99 per month and Sterile Processing Technician sells 4 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Sterile Processing Technician holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: AST CST Exam Prep has 284 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 25% of AST CST Exam Prep's written reviews are positive against 33% of Sterile Processing Technician's.

AST CST Exam Prep ships an update every 2 months, Sterile Processing Technician every 5 months. The most recent releases landed on October 16, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | AST CST Exam Prep | Sterile Processing Technician |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (284 ratings)](https://appshunter.io/ios/app/ast-cst-exam-prep/id1569418216/reviews) | **[4.8 (12 ratings)](https://appshunter.io/ios/app/sterile-processing-technician/id6476984772/reviews)** |
| Number of ratings | **284** | 12 |
| Positive reviews | 25.0% of reviews | **33.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 35 MB | 88 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [MastrAPI](https://appshunter.io/developer/1618627725) | [Erdem Kara](https://appshunter.io/developer/1015700209) |

## What reviewers say

### AST CST Exam Prep

[App page](https://appshunter.io/ios/app/ast-cst-exam-prep/id1569418216)

Prepare for your Certified Surgical Technologist (CST) exam with a personalized study plan. Practice with over 550 questions, track your progress, and compare your scores to the community average to boost your confidence and pass on your first attempt.

**Highlights:** Personalized study plan, 550+ practice questions, Track strengths and weaknesses, Detailed test statistics, Community score comparison, Multiple exam options

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly with trial | $24.99 | per month |
| Lifetime access | $99.99 | one-time |

**What reviewers like**

- 👍 Useful information
- 👍 App proved useful for exam prep
- 👍 Passed exam with app's help

**What reviewers complain about**

- 🐛 Answers change after submission
- 🐛 Incorrect scoring
- 🐛 Repeated questions
- 🐛 Misspellings and poor wording
- 🐛 Answers marked incorrect when correct

**Reported bugs**

- Answers change after submission
- Incorrect scoring
- Repeated questions
- Misspellings and poor wording
- Answers marked incorrect when correct

**Requested features**

- iPad version of the app
- Personalizing tests
- Better questions


### Sterile Processing Technician

[App page](https://appshunter.io/ios/app/sterile-processing-technician/id6476984772)

Prepare for your Sterile Processing and Distribution Technician Exam with an AI-driven learning platform. Access over 3500 practice questions and realistic mock tests to assess your readiness and master key concepts. Save your progress and stay confident for your exam journey.

**Highlights:** Over 3500 practice questions, AI-driven learning platform, Categorized topics, Realistic mock tests, Progress saving, Up-to-date content

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Weekly Subscription | $9.99 | per 7 days |
| Premium - Monthly Subscription | $24.99 | per month |
| Premium-Quarterly Subscription | $49.99 | per 3 months |
| Premium - Yearly Subscription | $99.99 | per year |


## Frequently asked questions

### Is AST CST Exam Prep free?

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

### Is Sterile Processing Technician free?

Sterile Processing Technician is free to download, with in-app purchases available.

### Which has better reviews, AST CST Exam Prep or Sterile Processing Technician?

Sterile Processing Technician is rated higher. AST CST Exam Prep averages 4.6 out of 5 from 284 ratings, while Sterile Processing Technician averages 4.8 from 12 ratings.

### Do AST CST Exam Prep or Sterile Processing Technician have ads?

Neither AST CST Exam Prep nor Sterile Processing Technician shows ads.

### Which is updated more often, AST CST Exam Prep or Sterile Processing Technician?

AST CST Exam Prep ships an update every 2 months, and Sterile Processing Technician every 5 months. Most recently, AST CST Exam Prep was updated on October 16, 2026 and Sterile Processing Technician on October 3, 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.*