# SatRadio vs RST Scope

The clearest difference is ads: SatRadio at none against RST Scope's shown. SatRadio also leads on monetization model (free vs ad-supported) and iOS requirement (12.4 vs 15.6). RST Scope's advantage is update cadence (every 3 days vs every 10 months). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

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

SatRadio ships an update every 10 months, RST Scope every 3 days. The most recent releases landed on October 5, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | SatRadio | RST Scope |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/satradio/id1497481844/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/rst-scope/id1550582276/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 3 days** |
| Monetization | **Free** | Ad-supported |
| Size | 8 MB | 5 MB |
| Requires iOS | **12.4** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Dioptase](https://appshunter.io/developer/376559675) | [koji kamogawa](https://appshunter.io/developer/1488210713) |

## What reviewers say

### SatRadio

[App page](https://appshunter.io/ios/app/satradio/id1497481844)

This app provides essential tools for radio and satellite communication engineers. It includes calculators and analysis features for antenna parameters, frequency calculations, link budgets, and modem performance. It also offers miscellaneous utilities for RF engineering tasks.

**Highlights:** Dish antenna analysis (axial ratio, gain, line of sight), Frequency calculations (phase noise, doppler, wavelength), Radio link analysis (coaxial losses, mismatch losses, EIRP), Modem performance metrics (C/N, C/I, PER, BER), Miscellaneous RF engineering utilities (dB calculator, converters)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is SatRadio free?

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

### Is RST Scope free?

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

### Which has better reviews, SatRadio or RST Scope?

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

### Do SatRadio or RST Scope have ads?

RST Scope shows ads; SatRadio does not.

### Which is updated more often, SatRadio or RST Scope?

SatRadio ships an update every 10 months, and RST Scope every 3 days. Most recently, SatRadio was updated on October 5, 2026 and RST Scope 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.*