# CAS vs Locked In

The clearest difference is in-app purchases: CAS at none against Locked In's 1. CAS also leads on iOS requirement (15.0 vs 17.0). Locked In's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Locked In sells 1 one-off in-app purchase. CAS asks for nothing beyond the download.

CAS ships an update every 2 months, Locked In every 2 weeks. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | CAS | Locked In |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 27 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Davy Raitt](https://appshunter.io/developer/1795318281) | [OMAR DANIEL GRAZIANO](https://appshunter.io/developer/1896485759) |

## What reviewers say

### CAS

[App page](https://appshunter.io/ios/app/cas-005-securityx-exam-prep/id6761843278)

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

**In-app purchases:** none


### Locked In

[App page](https://appshunter.io/ios/app/locked-in-prep-for-securityx/id6770693421)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Locked In! SecurityX Unlock | $14.99 | one-time |


## Frequently asked questions

### Is CAS free?

CAS is free to download, with no in-app purchases.

### Is Locked In free?

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

### Do CAS or Locked In have ads?

Neither CAS nor Locked In shows ads.

### Which is updated more often, CAS or Locked In?

CAS ships an update every 2 months, and Locked In every 2 weeks. Most recently, CAS was updated on October 21, 2026 and Locked In on October 25, 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.*