# KeyHub vs RF Engineer's Calc

The clearest difference is update cadence: KeyHub at weekly against RF Engineer's Calc's every 10 months. KeyHub also leads on device support (3 vs 1) and iOS requirement (12.1 vs 16.1). On price, ads and in-app purchases there is nothing between them.

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

KeyHub ships an update weekly, RF Engineer's Calc every 10 months. The most recent releases landed on October 30, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | KeyHub | RF Engineer's Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 months |
| Size | 17 MB | 43 MB |
| Requires iOS | **12.1** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gversion Ltd](https://appshunter.io/developer/1095300042) | [GRAHAM JOHN SMITH](https://appshunter.io/developer/1668396908) |

## What reviewers say

### KeyHub

[App page](https://appshunter.io/ios/app/keyhub/id1573928964)

**Features:** macOS Compatibility

**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 KeyHub free?

KeyHub 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 KeyHub or RF Engineer's Calc have ads?

Neither KeyHub nor RF Engineer's Calc shows ads.

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

KeyHub ships an update weekly, and RF Engineer's Calc every 10 months. Most recently, KeyHub was updated on October 30, 2026 and RF Engineer's Calc on October 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*