# RST Scope vs Stamp Stack

The clearest difference is price: RST Scope at Free against Stamp Stack's $3.99. Stamp Stack's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

RST Scope is free to download; Stamp Stack costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | RST Scope | Stamp Stack |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| 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 | — |
| Monetization | Ad-supported | — |
| Size | 5 MB | 82 MB |
| Requires iOS | 15.6 | **15.5** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [koji kamogawa](https://appshunter.io/developer/1488210713) | [Daniel Goodwin](https://appshunter.io/developer/1830723743) |

## 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


### Stamp Stack

[App page](https://appshunter.io/ios/app/stamp-stack/id6757575828)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RST Scope free?

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

### Is Stamp Stack free?

Stamp Stack costs $3.99, with no in-app purchases.

### Do RST Scope or Stamp Stack have ads?

RST Scope shows ads; Stamp Stack does not.

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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.*