# RF Slide Rule vs Ham Engineering

The clearest difference is update cadence: RF Slide Rule at weekly against Ham Engineering's every 3 weeks. RF Slide Rule also leads on iOS requirement (7.0 vs 13.0). 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.

RF Slide Rule ships an update weekly, Ham Engineering every 3 weeks. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | RF Slide Rule | Ham Engineering |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Size | 1 MB | 21 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CEC, S.A.](https://appshunter.io/developer/537230070) | [Yousif AL Balushi](https://appshunter.io/developer/1855752610) |

## What reviewers say

### RF Slide Rule

[App page](https://appshunter.io/ios/app/rf-slide-rule/id448166676)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ham Engineering

[App page](https://appshunter.io/ios/app/ham-engineering/id6795236723)

**In-app purchases:** none


## Frequently asked questions

### Is RF Slide Rule free?

RF Slide Rule is free to download, with no in-app purchases.

### Is Ham Engineering free?

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

### Do RF Slide Rule or Ham Engineering have ads?

Neither RF Slide Rule nor Ham Engineering shows ads.

### Which is updated more often, RF Slide Rule or Ham Engineering?

RF Slide Rule ships an update weekly, and Ham Engineering every 3 weeks. Most recently, RF Slide Rule was updated on September 10, 2026 and Ham Engineering on September 17, 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.*