# RST Scope vs Passmic

The clearest difference is ads: Passmic at none against RST Scope's shown. RST Scope's advantage is iOS requirement (15.6 vs 18.6). On price, update cadence, in-app purchases and device support there is nothing between them.

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

RST Scope ships an update every 3 days, Passmic every 4 days. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | RST Scope | Passmic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rst-scope/id1550582276/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 4 days |
| Monetization | Ad-supported | — |
| Size | 5 MB | 4 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | iPhone, iPod | iPhone, Mac |
| Age rating | 4+ | 9+ |
| Developer | [koji kamogawa](https://appshunter.io/developer/1488210713) | [Muhammad Ariq Hendry](https://appshunter.io/developer/6777020686) |

## 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


### Passmic

[App page](https://appshunter.io/ios/app/passmic/id6777161605)

**In-app purchases:** none


## Frequently asked questions

### Is RST Scope free?

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

### Is Passmic free?

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

### Do RST Scope or Passmic have ads?

RST Scope shows ads; Passmic does not.

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

RST Scope ships an update every 3 days, and Passmic every 4 days. Most recently, RST Scope was updated on October 9, 2026 and Passmic on October 10, 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.*