# iSlipstick RF vs iSmith

The clearest difference is ads: iSlipstick RF at none against iSmith's shown. iSlipstick RF also leads on monetization model (free vs ad-supported) and ratings volume (3 vs 1). iSmith's advantage is update cadence (every 2 days vs every 10 months) and rating (5.0 vs 4.7). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

iSmith holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

iSlipstick RF ships an update every 10 months, iSmith every 2 days. The most recent releases landed on September 17, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | iSlipstick RF | iSmith |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (3 ratings)](https://appshunter.io/ios/app/islipstick-rf/id351775311/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ismith/id6444874930/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 2 days** |
| Monetization | **Free** | Ad-supported |
| Size | 43 MB | 7 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Sam Virgillo](https://appshunter.io/developer/324560825) | [Ryoun Chon Shin](https://appshunter.io/developer/1657565687) |

## 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


### iSmith

[App page](https://appshunter.io/ios/app/ismith/id6444874930)

This app helps users understand impedance matching principles. It allows for reading key network parameters from a Smith chart and calculating various matching networks and pads. Users can also convert between different power and voltage units.

**Highlights:** Read Smith chart parameters (Z, Y, VSWR, Q, Gamma), Calculate 8 L-matching networks, Calculate T & Pi matching pads, Set matching targets on Smith chart, Learn impedance matching principles, dBm, Watts, and Volts conversion, VSWR conversion

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iSlipstick RF free?

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

### Is iSmith free?

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

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

iSmith is rated higher. iSlipstick RF averages 4.7 out of 5 from 3 ratings, while iSmith averages 5.0 from 1 ratings.

### Do iSlipstick RF or iSmith have ads?

iSmith shows ads; iSlipstick RF does not.

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

iSlipstick RF ships an update every 10 months, and iSmith every 2 days. Most recently, iSlipstick RF was updated on September 17, 2026 and iSmith on September 21, 2026.

---

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