# RF Slide Rule vs Prombee Config App

The clearest difference is update cadence: RF Slide Rule at weekly against Prombee Config App's every 6 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, Prombee Config App every 6 weeks. The most recent releases landed on October 26, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | RF Slide Rule | Prombee Config App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 6 weeks |
| Size | 1 MB | 2 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) | [Traffic Sim Co.,Ltd.](https://appshunter.io/developer/1523422659) |

## What reviewers say

### RF Slide Rule

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Prombee Config App

[App page](https://appshunter.io/ios/app/prombee-config-app/id1523422657)

**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 Prombee Config App free?

Prombee Config App is free to download, with no in-app purchases.

### Do RF Slide Rule or Prombee Config App have ads?

Neither RF Slide Rule nor Prombee Config App shows ads.

### Which is updated more often, RF Slide Rule or Prombee Config App?

RF Slide Rule ships an update weekly, and Prombee Config App every 6 weeks. Most recently, RF Slide Rule was updated on October 26, 2026 and Prombee Config App on October 9, 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.*