# iSlipstick vs splotRF

The clearest difference is update cadence: splotRF at every 10 days against iSlipstick's every 3 months. iSlipstick's advantage is iOS requirement (12.0 vs 18.0). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for iSlipstick against 5.0 for splotRF. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

iSlipstick ships an update every 3 months, splotRF every 10 days. The most recent releases landed on October 5, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | iSlipstick | splotRF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/islipstick/id324560822/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/splotrf/id1599892560/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Free | Free |
| Size | 36 MB | 6 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Sam Virgillo](https://appshunter.io/developer/324560825) | [DirectRF](https://appshunter.io/developer/1572692412) |

## What reviewers say

### iSlipstick

[App page](https://appshunter.io/ios/app/islipstick/id324560822)

This app provides a suite of essential electronic formula calculators and unit converters. It simplifies complex calculations for Ohm's law, LC circuits, impedance, and more, with a user-friendly interface for quick input and reordering of frequently used tools.

**Highlights:** Ohm's law calculator, Op-Amp gain calculator, LC circuit resonance calculator, RLC circuit impedance calculator, dBm to voltage/power converter, Resistor calculator, Unit converters (metric/imperial)

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

**In-app purchases:** none


### splotRF

[App page](https://appshunter.io/ios/app/splotrf/id1599892560)

Visualize and analyze touchstone S-parameter data with interactive plots. Supports multiple file overlays, stability calculations, and various matrix conversions. Export data in vector graphics formats.

**Highlights:** Plot .snp format S-parameter data, Stability circles and µ/µ' analysis, Overlay multiple trace data, View data as a table, S/Y/Z matrix conversion, Smith Chart, Polar, and Rectangular plots, Export to PDF

**In-app purchases:** none


## Frequently asked questions

### Is iSlipstick free?

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

### Is splotRF free?

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

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

iSlipstick and splotRF are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.

### Do iSlipstick or splotRF have ads?

Neither iSlipstick nor splotRF shows ads.

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

iSlipstick ships an update every 3 months, and splotRF every 10 days. Most recently, iSlipstick was updated on October 5, 2026 and splotRF on October 13, 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.*