# Sterile Processing Prep vs Security Guard Prep & Tools

The clearest difference is price: Security Guard Prep & Tools at Free against Sterile Processing Prep's $2.99. Security Guard Prep & Tools also leads on iOS requirement (17.0 vs 26.1). Sterile Processing Prep's advantage is in-app purchases (none vs 2). On update cadence, ads and device support there is nothing between them.

Security Guard Prep & Tools is free to download; Sterile Processing Prep costs $2.99 up front. Security Guard Prep & Tools sells 2 in-app purchases, starting at $9.99 per month. Sterile Processing Prep asks for nothing beyond the download.

Sterile Processing Prep ships an update every 2 months, Security Guard Prep & Tools every 4 months. The most recent releases landed on September 11, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Sterile Processing Prep | Security Guard Prep & Tools |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Size | 5 MB | 7 MB |
| Requires iOS | 26.1 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Tracy Gates](https://appshunter.io/developer/1065459770) | [Deeun Inc.](https://appshunter.io/developer/1691824695) |

## What reviewers say

### Sterile Processing Prep

[App page](https://appshunter.io/ios/app/sterile-processing-prep/id6757114416)

**Features:** macOS Compatibility

**In-app purchases:** none


### Security Guard Prep & Tools

[App page](https://appshunter.io/ios/app/security-guard-prep-and-tools/id6758803074)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Security Guard Prep Pro Monthly | $9.99 | per month |
| Pro - Lifetime Access | $24.99 | one-time |


## Frequently asked questions

### Is Sterile Processing Prep free?

Sterile Processing Prep costs $2.99, with no in-app purchases.

### Is Security Guard Prep & Tools free?

Security Guard Prep & Tools is free to download, with in-app purchases available.

### Do Sterile Processing Prep or Security Guard Prep & Tools have ads?

Neither Sterile Processing Prep nor Security Guard Prep & Tools shows ads.

### Which is updated more often, Sterile Processing Prep or Security Guard Prep & Tools?

Sterile Processing Prep ships an update every 2 months, and Security Guard Prep & Tools every 4 months. Most recently, Sterile Processing Prep was updated on September 11, 2026 and Security Guard Prep & Tools on September 23, 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.*