# Sterile Processing vs Surgical Instrument Learning

The clearest difference is update cadence: Surgical Instrument Learning at every 4 days against Sterile Processing's every 4 months. Surgical Instrument Learning also leads on rating (5.0 vs 4.8). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Sterile Processing sells 3 in-app purchases, starting at $9.99 per month and Surgical Instrument Learning sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

Surgical Instrument Learning holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

Sterile Processing ships an update every 4 months, Surgical Instrument Learning every 4 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Sterile Processing | Surgical Instrument Learning |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (4 ratings)](https://appshunter.io/ios/app/sterile-processing-crcst-prep/id6758952508/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/surgical-instrument-learning/id6809893449/reviews)** |
| Number of ratings | **4** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 8 MB | 61 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Deeun Inc.](https://appshunter.io/developer/1691824695) | [CSTSetup](https://appshunter.io/developer/1886831213) |

## What reviewers say

### Sterile Processing

[App page](https://appshunter.io/ios/app/sterile-processing-crcst-prep/id6758952508)

Prepare for the CRCST exam with practice questions, instrument identification drills, and study guides. Plan your study routine, track progress, and review core sterile processing topics. Offers a free experience with optional monthly, annual, or lifetime subscriptions for full access.

**Highlights:** 320 practice questions, Instrument identification drill, Daily study tasks, Five study guides, 24 flashcards, Progress tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - Monthly | $9.99 | per month |
| Prep Pro Annual | $29.99 | per year |
| Pro - Lifetime Access | $59.99 | one-time |


### Surgical Instrument Learning

[App page](https://appshunter.io/ios/app/surgical-instrument-learning/id6809893449)

Master surgical instruments with flashcards and exams based on real photographs. Practice identifying instruments for specific surgeries and trays, track your progress, and even add custom instruments. Pro members get access to interactive 3D models.

**Highlights:** 3,300+ instruments with photos, Flashcards, practice tests, timed exams, 3D instrument models (Pro), Tray and surgery practice, Progress tracking, Custom instrument addition, Instrument of the Day

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CSTSetup Monthly Pro | $12.99 | per month |
| CSTSetup Yearly Pro | $155.99 | per year |


## Frequently asked questions

### Is Sterile Processing free?

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

### Is Surgical Instrument Learning free?

Surgical Instrument Learning is free to download, with in-app purchases available.

### Which has better reviews, Sterile Processing or Surgical Instrument Learning?

Surgical Instrument Learning is rated higher. Sterile Processing averages 4.8 out of 5 from 4 ratings, while Surgical Instrument Learning averages 5.0 from 2 ratings.

### Do Sterile Processing or Surgical Instrument Learning have ads?

Neither Sterile Processing nor Surgical Instrument Learning shows ads.

### Which is updated more often, Sterile Processing or Surgical Instrument Learning?

Sterile Processing ships an update every 4 months, and Surgical Instrument Learning every 4 days. Most recently, Sterile Processing was updated on November 9, 2026 and Surgical Instrument Learning on October 31, 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.*