# BasicATTCalc vs splotRF

The clearest difference is price: splotRF at Free against BasicATTCalc's $1.99. splotRF also leads on update cadence (every 10 days vs every 29 months). BasicATTCalc's advantage is iOS requirement (14.5 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

splotRF is free to download; BasicATTCalc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BasicATTCalc ships an update every 29 months, splotRF every 10 days. The most recent releases landed on December 20, 2025 and September 10, 2026 respectively.

## The numbers

| Metric | BasicATTCalc | splotRF |
| --- | --- | --- |
| Price | $1.99 | **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 29 months | **Every 10 days** |
| Monetization | — | Free |
| Size | 7 MB | 6 MB |
| Requires iOS | **14.5** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [TAKAHIKO FUKUYAMA](https://appshunter.io/developer/857468511) | [DirectRF](https://appshunter.io/developer/1572692412) |

## What reviewers say

### BasicATTCalc

[App page](https://appshunter.io/ios/app/basicattcalc/id947238679)

**Features:** macOS Compatibility

**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 BasicATTCalc free?

BasicATTCalc costs $1.99, with no in-app purchases.

### Is splotRF free?

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

### Do BasicATTCalc or splotRF have ads?

Neither BasicATTCalc nor splotRF shows ads.

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

BasicATTCalc ships an update every 29 months, and splotRF every 10 days. Most recently, BasicATTCalc was updated on December 20, 2025 and splotRF on September 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.*