# RST Scope vs GPSメモ

The clearest difference is update cadence: RST Scope at every 3 days against GPSメモ's every 4 months. GPSメモ's advantage is iOS requirement (12.0 vs 15.6). On price, ads, 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, GPSメモ every 4 months. The most recent releases landed on August 22, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | RST Scope | GPSメモ |
| --- | --- | --- |
| 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 | Yes |
| Update frequency | **Every 3 days** | Every 4 months |
| Monetization | Ad-supported | — |
| Size | 5 MB | 65 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [koji kamogawa](https://appshunter.io/developer/1488210713) | [kazuya koshiyama](https://appshunter.io/developer/1477982094) |

## 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


### GPSメモ

[App page](https://appshunter.io/ios/app/gps/id1588373523)

**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 GPSメモ free?

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

### Do RST Scope or GPSメモ have ads?

Both RST Scope and GPSメモ show ads.

### Which is updated more often, RST Scope or GPSメモ?

RST Scope ships an update every 3 days, and GPSメモ every 4 months. Most recently, RST Scope was updated on August 22, 2026 and GPSメモ on September 23, 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.*