# Smith Charts vs RF toolbox

The clearest difference is price: RF toolbox at Free against Smith Charts's $3.99. RF toolbox also leads on iOS requirement (13.0 vs 15.0). Smith Charts's advantage is in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 6 months). On ads and device support there is nothing between them.

RF toolbox is free to download; Smith Charts costs $3.99 up front. RF toolbox sells 1 one-off in-app purchase. Smith Charts asks for nothing beyond the download.

Smith Charts ships an update every 3 weeks, RF toolbox every 6 months. The most recent releases landed on September 21, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Smith Charts | RF toolbox |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/smith-charts/id1602503719/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 months |
| Monetization | Paid | — |
| Size | 24 MB | 28 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Edoardo Orzes](https://appshunter.io/developer/1665361246) | [Anas Abubakar](https://appshunter.io/developer/1581534101) |

## What reviewers say

### Smith Charts

[App page](https://appshunter.io/ios/app/smith-charts/id1602503719)

Design matching networks, analyze device parameters, and compute stability circles with this interactive tool. Supports S parameters, various components, and offers advanced engineering features for RF design. Available in dark mode and exportable to PDF.

**Highlights:** Interactive Smith chart with drag and zoom, Design matching networks with various components, Compute stability, equi gain, and noise circles, Import S parameters from Touchstone files, Export designs to PDF, image, or file, Dark mode support, Ruler for wavelength measurement

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

**In-app purchases:** none


### RF toolbox

[App page](https://appshunter.io/ios/app/rf-toolbox-electronics/id6757265018)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| upgrade to pro | $3.99 | one-time |


## Frequently asked questions

### Is Smith Charts free?

Smith Charts costs $3.99, with no in-app purchases.

### Is RF toolbox free?

RF toolbox is free to download, with in-app purchases available.

### Do Smith Charts or RF toolbox have ads?

Neither Smith Charts nor RF toolbox shows ads.

### Which is updated more often, Smith Charts or RF toolbox?

Smith Charts ships an update every 3 weeks, and RF toolbox every 6 months. Most recently, Smith Charts was updated on September 21, 2026 and RF toolbox on September 9, 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.*