# TheWhy vs CRCST Sterile Processing Prep

The clearest difference is update cadence: TheWhy at weekly against CRCST Sterile Processing Prep's every 2 months. TheWhy also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. TheWhy sells 5 in-app purchases, starting at $4.99 per month and CRCST Sterile Processing Prep sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

TheWhy ships an update weekly, CRCST Sterile Processing Prep every 2 months. The most recent releases landed on September 18, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | TheWhy | CRCST Sterile Processing Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thewhy/id6762951095/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Freemium | — |
| Size | 34 MB | 48 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MICHAEL ANTHONY ROGERS](https://appshunter.io/developer/1890214788) | [Jinyoung Lee](https://appshunter.io/developer/1880091360) |

## What reviewers say

### TheWhy

[App page](https://appshunter.io/ios/app/thewhy/id6762951095)

This app helps users defend their faith through AI-powered debates and structured training exercises. It covers a wide range of theological and apologetic topics with diverse AI opponents and practice drills.

**Highlights:** AI-powered faith defense debates, Structured theology training, Diverse AI opponent personalities, Practice drills for argument identification, Gospel sharing simulations, Argument analysis tool, Friend challenge feature

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Leader Add-On (Monthly) | $4.99 | per month |
| The Why - Pro | $6.99 | per month |
| Leader Add-On (Yearly) | $39.99 | per year |
| The Why - Pro | $54.99 | per year |
| The Why - Lifetime | $79.99 | one-time |


### CRCST Sterile Processing Prep

[App page](https://appshunter.io/ios/app/crcst-sterile-processing-prep/id6787889891)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CRCST Premium Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is TheWhy free?

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

### Is CRCST Sterile Processing Prep free?

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

### Do TheWhy or CRCST Sterile Processing Prep have ads?

Neither TheWhy nor CRCST Sterile Processing Prep shows ads.

### Which is updated more often, TheWhy or CRCST Sterile Processing Prep?

TheWhy ships an update weekly, and CRCST Sterile Processing Prep every 2 months. Most recently, TheWhy was updated on September 18, 2026 and CRCST Sterile Processing Prep on September 19, 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.*