# RF vs RF calculator & Smith Chart

The clearest difference is price: RF calculator & Smith Chart at Free against RF's $7.99. RF's advantage is in-app purchases (none vs 1) and iOS requirement (11.1 vs 15.0). On update cadence, ads and device support there is nothing between them.

RF calculator & Smith Chart is free to download; RF costs $7.99 up front. RF calculator & Smith Chart sells 1 one-off in-app purchase. RF asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 11, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | RF | RF calculator & Smith Chart |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[4.9 (22 ratings)](https://appshunter.io/ios/app/rf-toolbox-pro/id593044099/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 91.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Paid | — |
| Size | 92 MB | 31 MB |
| Requires iOS | **11.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Marcus Roskosch](https://appshunter.io/developer/334053438) | [Anas Abubakar](https://appshunter.io/developer/1581534101) |

## What reviewers say

### RF

[App page](https://appshunter.io/ios/app/rf-toolbox-pro/id593044099)

This app provides over 90 specialized tools for high-frequency electronics, catering to RF professionals, radio amateurs, and students. It offers calculations for PCB traces, filters, impedance, and more, with ongoing updates and new features planned.

**Highlights:** PCB Trace Width and Impedance, LC/L/T/Pi Match Calculation, Coax Cable Calculations, Amplifier and Attenuator Cascade, SWR/Reflection/Return Loss Conversion, Filter Design (Butterworth, Chebyshev), RF Units Conversion

**In-app purchases:** none


### RF calculator & Smith Chart

[App page](https://appshunter.io/ios/app/rf-calculator-and-smith-chart/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 RF free?

RF costs $7.99, with no in-app purchases.

### Is RF calculator & Smith Chart free?

RF calculator & Smith Chart is free to download, with in-app purchases available.

### Do RF or RF calculator & Smith Chart have ads?

Neither RF nor RF calculator & Smith Chart shows ads.

### Which is updated more often, RF or RF calculator & Smith Chart?

RF ships an update every 4 months, and RF calculator & Smith Chart every 4 months. Most recently, RF was updated on October 11, 2026 and RF calculator & Smith Chart 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.*