# CMS Engineer vs RF Engineer's Calc

The clearest difference is update cadence: CMS Engineer at monthly against RF Engineer's Calc's every 10 months. CMS Engineer also leads on iOS requirement (13.4 vs 16.1). 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, RF Engineer's Calc every 10 months. The most recent releases landed on September 23, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | CMS Engineer | RF Engineer's Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 10 months |
| Size | 36 MB | 43 MB |
| Requires iOS | **13.4** | 16.1 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [CMS SupaTrak Ltd](https://appshunter.io/developer/1565174937) | [GRAHAM JOHN SMITH](https://appshunter.io/developer/1668396908) |

## 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


### RF Engineer's Calc

[App page](https://appshunter.io/ios/app/rf-engineers-calc/id1668396906)

**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 RF Engineer's Calc free?

RF Engineer's Calc is free to download, with no in-app purchases.

### Do CMS Engineer or RF Engineer's Calc have ads?

Neither CMS Engineer nor RF Engineer's Calc shows ads.

### Which is updated more often, CMS Engineer or RF Engineer's Calc?

CMS Engineer ships an update monthly, and RF Engineer's Calc every 10 months. Most recently, CMS Engineer was updated on September 23, 2026 and RF Engineer's Calc on October 6, 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.*