# RF Slide Rule vs RC

The clearest difference is iOS requirement: RF Slide Rule at 7.0 against RC's 13.0. On price, update cadence, 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.

RF Slide Rule ships an update weekly, RC fortnightly. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | RF Slide Rule | RC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Size | 1 MB | 84 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CEC, S.A.](https://appshunter.io/developer/537230070) | [NextDrive Co.](https://appshunter.io/developer/1005329987) |

## What reviewers say

### RF Slide Rule

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

**Features:** macOS Compatibility

**In-app purchases:** none


### RC

[App page](https://appshunter.io/ios/app/rc-o/id6502586997)

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

**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 RC free?

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

### Do RF Slide Rule or RC have ads?

Neither RF Slide Rule nor RC shows ads.

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

RF Slide Rule ships an update weekly, and RC fortnightly. Most recently, RF Slide Rule was updated on October 14, 2026 and RC 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.*