# RST Scope Pro — Spectrum & WaterFall Display

> Spectrum & WaterFall Display (iPhone/iPad app by koji kamogawa.)

- Source: https://appshunter.io/ios/app/rst-scope-pro/id1550939327 (this page in markdown: same URL + `.md`)
- Developer: [koji kamogawa](https://appshunter.io/developer/1488210713)
- Category: Utilities, Education
- Price: $1.99
- Age rating: 4+
- Requires: iOS 15.6 · 1 MB
- Languages: American English, Japanese
- Released: 2021-01-28
- Data updated: 2026-03-12
- User reviews in markdown: https://appshunter.io/ios/app/rst-scope-pro/id1550939327/reviews.md

## What is RST Scope Pro?

This is an app for amateur radio operators with a narrow band of audio frequency, spectrum scope & waterfall display.

You can get a rich display by microphone inputting the speaker output of a radio that does not have a spectrum scope or waterfall function. The FFT allows you to distinguish between the dot and dash of Morse code.

[function]
1. Ability to change the speed of the waterfall
2. Ability to adjust the level of audio input
3. Function to switch the display band between wide and narrow
4. Display pause function (pause / cancel by touching the screen)
5. Display scaling for iPhone Display size.
6. Function to switch frequency resolution.(40Hz/20Hz/10Hz)
7. Function to switch between bar graph and line graph
8. Function to switch the cross hatch ON / OFF by longTap
9. Function to switch the USB/LSB by Left/Right Swipe
10.Recording/Playback function of Input Sound
11.File Listing function

RST Scope(Free) 
https://www.youtube.com/watch?v=1s9RvOFp52g


## Version history (last 5 releases)

### 2.1.3 — 2026-01-16

We updated the operating stability and display format.

### 2.0.0 — 2023-02-18

Reviewed the drawing area according to the display size.

### 1.9.0 — 2022-07-31

Fixed the problem of screen display (zoom mode) on iPhoneX to iPhone13.

### 1.8.0 — 2021-06-12

Fixed a bug.

### 1.7.0 — 2021-06-12

Supports multiple recording / playback file functions.
Fixed a bug.

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| --- | --- | --- | --- |
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| [Shortwave Guide](https://appshunter.io/ios/app/shortwave-guide/id1629061921) | — | $8.99 | Utilities |
| [TRIFORA Mobile](https://appshunter.io/ios/app/trifora-mobile/id1552683080) | — | Free | Utilities |
| [MagicSDR](https://appshunter.io/ios/app/magicsdr/id1563954272) | 2.9 (7) | $12.99 | Utilities |
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## More apps by koji kamogawa

- [UkeDrum](https://appshunter.io/ios/app/ukedrum/id1488210714)
- [RST 599](https://appshunter.io/ios/app/rst-599/id1488919851)
- [WabunMorse](https://appshunter.io/ios/app/wabunmorse/id1490745806)
- [音耳せん](https://appshunter.io/ios/app/id1496478545)
- [RST 599 Pro](https://appshunter.io/ios/app/rst-599-pro/id1497452984)
- [RST 599x](https://appshunter.io/ios/app/rst-599x/id1498597799)

All apps by koji kamogawa: https://appshunter.io/developer/1488210713

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-03-12.*