# RST Scope vs RF Engineer Toolkit

The clearest difference is in-app purchases: RST Scope at none against RF Engineer Toolkit's 3. RST Scope also leads on update cadence (every 3 days vs every 2 months) and iOS requirement (15.6 vs 17.6). RF Engineer Toolkit's advantage is ads (none vs shown). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. RF Engineer Toolkit sells 3 in-app purchases, starting at $0.99 per month. RST Scope asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for RST Scope against 5.0 for RF Engineer Toolkit. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

RST Scope ships an update every 3 days, RF Engineer Toolkit every 2 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | RST Scope | RF Engineer Toolkit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/rst-scope/id1550582276/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/rf-engineer-toolkit/id6745524609/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 2 months |
| Monetization | **Ad-supported** | Freemium |
| Size | 5 MB | 12 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [koji kamogawa](https://appshunter.io/developer/1488210713) | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) |

## What reviewers say

### RST Scope

[App page](https://appshunter.io/ios/app/rst-scope/id1550582276)

This utility app provides spectrum scope and waterfall displays for amateur radio operators. It enhances radios lacking these features by analyzing microphone input, allowing for clear distinction of Morse code and detailed audio frequency visualization.

**Highlights:** Spectrum scope and waterfall display, Morse code distinction via FFT, Adjustable waterfall speed, Adjustable audio input level, Switchable display band (wide/narrow), Display pause function, Recording and playback of input sound

**In-app purchases:** none


### RF Engineer Toolkit

[App page](https://appshunter.io/ios/app/rf-engineer-toolkit/id6745524609)

This app provides a comprehensive suite of 45 RF and antenna calculators for engineers and technicians. It offers unit-tested formulas for field, site, and lab calculations, including RF exposure and impedance matching. A free version offers 16 calculators, with Pro unlocking all features and advanced options.

**Highlights:** 45 RF and antenna calculators, Unit-tested formulas against industry standards, Field and site calculations (VSWR, link budget, RF exposure), Design and lab calculations (Smith chart, impedance matching, filters), Everyday RF conversions (dBm, W, V), Free version with 16 calculators, Pro version with full access and advanced features

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version / monthly | $0.99 | per month |
| Full version / year | $4.99 | per year |
| Remove ADS | $9.99 | one-time |


## Frequently asked questions

### Is RST Scope free?

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

### Is RF Engineer Toolkit free?

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

### Which has better reviews, RST Scope or RF Engineer Toolkit?

RST Scope and RF Engineer Toolkit are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do RST Scope or RF Engineer Toolkit have ads?

RST Scope shows ads; RF Engineer Toolkit does not.

### Which is updated more often, RST Scope or RF Engineer Toolkit?

RST Scope ships an update every 3 days, and RF Engineer Toolkit every 2 months. Most recently, RST Scope was updated on November 3, 2026 and RF Engineer Toolkit on November 5, 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.*