# RST Scope vs QTH Locator

The clearest difference is ads: QTH Locator at none against RST Scope's shown. RST Scope's advantage is update cadence (every 3 days vs every 7 months). On price, in-app purchases, device support and iOS requirement 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, QTH Locator every 7 months. The most recent releases landed on August 22, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | RST Scope | QTH Locator |
| --- | --- | --- |
| 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 7 months |
| Monetization | Ad-supported | — |
| Size | 5 MB | 40 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [koji kamogawa](https://appshunter.io/developer/1488210713) | [Masahiro Ono](https://appshunter.io/developer/1626411247) |

## 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


### QTH Locator

[App page](https://appshunter.io/ios/app/qth-locator/id1626410825)

**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 QTH Locator free?

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

### Do RST Scope or QTH Locator have ads?

RST Scope shows ads; QTH Locator does not.

### Which is updated more often, RST Scope or QTH Locator?

RST Scope ships an update every 3 days, and QTH Locator every 7 months. Most recently, RST Scope was updated on August 22, 2026 and QTH Locator on September 18, 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.*