# iSlipstick RF vs RF

The clearest difference is price: iSlipstick RF at Free against RF's $7.99. iSlipstick RF also leads on review sentiment (100% vs 91%). RF's advantage is rating (4.9 vs 4.7) and update cadence (every 4 months vs every 10 months). On ads and in-app purchases there is nothing between them.

iSlipstick RF is free to download; RF costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RF holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: RF has 22 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 100% of iSlipstick RF's written reviews are positive against 91% of RF's, so the app with the better star average is not the one people write more warmly about.

iSlipstick RF ships an update every 10 months, RF every 4 months. The most recent releases landed on September 17, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | iSlipstick RF | RF |
| --- | --- | --- |
| Price | **Free** | $7.99 |
| Rating | [4.7 (3 ratings)](https://appshunter.io/ios/app/islipstick-rf/id351775311/reviews) | **[4.9 (22 ratings)](https://appshunter.io/ios/app/rf-toolbox-pro/id593044099/reviews)** |
| Number of ratings | 3 | **22** |
| Positive reviews | **100.0% of reviews** | 91.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 4 months** |
| Monetization | **Free** | Paid |
| Size | 43 MB | 92 MB |
| Requires iOS | 16.6 | **11.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sam Virgillo](https://appshunter.io/developer/324560825) | [Marcus Roskosch](https://appshunter.io/developer/334053438) |

## What reviewers say

### iSlipstick RF

[App page](https://appshunter.io/ios/app/islipstick-rf/id351775311)

This app provides a comprehensive suite of calculators and converters specifically designed for radio frequency (RF) engineers and technicians. It includes tools for path loss, antenna gain, intermodulation, and standard electrical calculations, along with various unit conversions.

**Highlights:** RF-specific calculators, Standard electrical calculators, Unit converters, Path loss calculation, Intermodulation analysis, Antenna gain and beamwidth

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

**In-app purchases:** none


### RF

[App page](https://appshunter.io/ios/app/rf-toolbox-pro/id593044099)

This app provides over 90 specialized tools for high-frequency electronics, catering to RF professionals, radio amateurs, and students. It offers calculations for PCB traces, filters, impedance, and more, with ongoing updates and new features planned.

**Highlights:** PCB Trace Width and Impedance, LC/L/T/Pi Match Calculation, Coax Cable Calculations, Amplifier and Attenuator Cascade, SWR/Reflection/Return Loss Conversion, Filter Design (Butterworth, Chebyshev), RF Units Conversion

**In-app purchases:** none


## Frequently asked questions

### Is iSlipstick RF free?

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

### Is RF free?

RF costs $7.99, with no in-app purchases.

### Which has better reviews, iSlipstick RF or RF?

RF is rated higher. iSlipstick RF averages 4.7 out of 5 from 3 ratings, while RF averages 4.9 from 22 ratings.

### Do iSlipstick RF or RF have ads?

Neither iSlipstick RF nor RF shows ads.

### Which is updated more often, iSlipstick RF or RF?

iSlipstick RF ships an update every 10 months, and RF every 4 months. Most recently, iSlipstick RF was updated on September 17, 2026 and RF on September 22, 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.*