# splotRF vs SWISS KNFE

The clearest difference is update cadence: splotRF at every 10 days against SWISS KNFE's every 9 months. splotRF also leads on device support (3 vs 1) and iOS requirement (18.0 vs 26.2). On price, 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.

splotRF ships an update every 10 days, SWISS KNFE every 9 months. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | splotRF | SWISS KNFE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/splotrf/id1599892560/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 9 months |
| Monetization | Free | — |
| Size | 6 MB | 1 MB |
| Requires iOS | **18.0** | 26.2 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [DirectRF](https://appshunter.io/developer/1572692412) | [Matthias Ebneter](https://appshunter.io/developer/1803859293) |

## What reviewers say

### 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


### SWISS KNFE

[App page](https://appshunter.io/ios/app/swiss-knfe-sensor-cockpit/id6747296533)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is splotRF free?

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

### Is SWISS KNFE free?

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

### Do splotRF or SWISS KNFE have ads?

Neither splotRF nor SWISS KNFE shows ads.

### Which is updated more often, splotRF or SWISS KNFE?

splotRF ships an update every 10 days, and SWISS KNFE every 9 months. Most recently, splotRF was updated on October 24, 2026 and SWISS KNFE on October 10, 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.*