# CMS Engineer vs AcousticCheck

The clearest difference is update cadence: CMS Engineer at monthly against AcousticCheck's every 4 months. CMS Engineer also leads on iOS requirement (13.4 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CMS Engineer ships an update monthly, AcousticCheck every 4 months. The most recent releases landed on October 30, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | CMS Engineer | AcousticCheck |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Size | 36 MB | 14 MB |
| Requires iOS | **13.4** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CMS SupaTrak Ltd](https://appshunter.io/developer/1565174937) | [rosenbinder UG](https://appshunter.io/developer/1775649828) |

## What reviewers say

### CMS Engineer

[App page](https://appshunter.io/ios/app/cms-engineer/id1617242346)

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

**In-app purchases:** none


### AcousticCheck

[App page](https://appshunter.io/ios/app/acousticcheck/id6737261712)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CMS Engineer free?

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

### Is AcousticCheck free?

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

### Do CMS Engineer or AcousticCheck have ads?

Neither CMS Engineer nor AcousticCheck shows ads.

### Which is updated more often, CMS Engineer or AcousticCheck?

CMS Engineer ships an update monthly, and AcousticCheck every 4 months. Most recently, CMS Engineer was updated on October 30, 2026 and AcousticCheck on October 27, 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.*