# RF calculator & Smith Chart vs EMC Debug

The clearest difference is in-app purchases: EMC Debug at none against RF calculator & Smith Chart's 1. EMC Debug also leads on update cadence (weekly vs every 4 months) and iOS requirement (13.0 vs 15.0). RF calculator & Smith Chart's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. RF calculator & Smith Chart sells 1 one-off in-app purchase. EMC Debug asks for nothing beyond the download.

RF calculator & Smith Chart ships an update every 4 months, EMC Debug weekly. The most recent releases landed on November 13, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | RF calculator & Smith Chart | EMC Debug |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/rf-calculator-and-smith-chart/id6757265018/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Free | — |
| Size | 31 MB | 63 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anas Abubakar](https://appshunter.io/developer/1581534101) | [CHEHUNG LIN](https://appshunter.io/developer/1875201673) |

## What reviewers say

### RF calculator & Smith Chart

[App page](https://appshunter.io/ios/app/rf-calculator-and-smith-chart/id6757265018)

This app provides a comprehensive suite of tools for RF engineers and enthusiasts, including impedance matching, network analysis, filter design, and antenna calculations. It simplifies complex RF engineering tasks with an intuitive interface and quick results.

**Highlights:** Smith Chart for impedance visualization, Impedance matching network design, RF filter design tools, RF attenuator design, Antenna and propagation calculations, RLC circuit analysis, Component design and reference

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| upgrade to pro | $5.99 | one-time |


### EMC Debug

[App page](https://appshunter.io/ios/app/emc-debug/id6758831611)

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

**In-app purchases:** none


## Frequently asked questions

### Is RF calculator & Smith Chart free?

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

### Is EMC Debug free?

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

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

EMC Debug shows ads; RF calculator & Smith Chart does not.

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

RF calculator & Smith Chart ships an update every 4 months, and EMC Debug weekly. Most recently, RF calculator & Smith Chart was updated on November 13, 2026 and EMC Debug on November 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.*