# RST 599xp — CW QSO Simulator for iPad

> Amateur radio CW QSO simulator with realistic call signs and signal variations. (iPhone/iPad app by koji kamogawa.)

- Source: https://appshunter.io/ios/app/rst-599xp/id1524193178 (this page in markdown: same URL + `.md`)
- Developer: [koji kamogawa](https://appshunter.io/developer/1488210713)
- Category: Education, Utilities
- Price: $2.99
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 40 MB
- Languages: American English
- Released: 2020-07-19
- Data updated: 2026-06-03
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/rst-599xp/id1524193178/reviews.md

## What is RST 599xp?

This app is a real CW QSO simulator for Amateur Radio. "599BK type QSO", "Rubber stamp type QSO" and "Contest type QSO" are supported. In addition, the call sign, signal level, CW speed, etc. that occur differ for each QSO in order to achieve realism. Furthermore, the call sign and CW speed of your own station that issues CQ can be set arbitrarily.

【Characteristic】
1. Reproduction of pile-up
(Called from up to 3 stations at the same time)
2. "599BK","Rubber Stamp" and "AADX Contest" style support.
3.RIT and CW filter functions 
   Band Width(300Hz/600Hz) control supported.
4.Realistic signal meter according to audio signal level.
5.Status display showing TX / RX operation.
6.The spectrum scope display

【Other features】
1. Function to select the number of QSOs to communicate (5, 20)
2. QRN ON / OFF selection function
3. Function to select the call area (JA's, W / W)
4. Judgement of "RST, QRA and QTH" or "RST, QRA and WX" information.
5.Supported the ESC button for escaping from the long TX/RX.
6.Supported the Score Clear button of your Hi-Score Data.
7.Support the capture function of Hi-Score dialog.
8.Supported the QSB in the mode of "599BK / AADX" and "W/W"

Supported keyboard input from Apple Silicon Mac. (Not compatible with iPadOS)
A-Z, 0-9, /
Enter:return
ESC:esc
BS:delete
CQ:UpArrow
AGN:DownArrow
TU:[
LEFT:LeftArrow
RIGHT:RightArrow

## Key features

- CW QSO simulation
- Realistic call signs and signal levels
- Pile-up reproduction (up to 3 stations)
- RIT and CW filter functions
- Spectrum scope display
- Contest and rubber stamp QSO styles

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/rst-599xp/id1524193178/reviews.md

### 5/5 — Excellent app for practicing!

*2024-05-31*

Easy to use app with real sounding QSO’s. Great for keeping your head-copy skills sharp. One feature I would eventually like to see is external keyboard support for iPad’s.

**Developer response:** Thanks 5-Star and comments. I would like to see if there is a better way.

## Frequently asked questions about RST 599xp

### What is RST 599xp?

RST 599xp is a CW QSO simulator designed for amateur radio operators. It realistically simulates contacts with varying call signs, signal strengths, and speeds, supporting different QSO styles like contest and rubber stamp.

### What learning methodology does RST 599xp use?

RST 599xp employs a simulation-based learning methodology. By providing a realistic environment for practicing CW QSOs, users can improve their skills in a practical, hands-on manner without needing to connect to actual radio equipment.

### How does RST 599xp track progress?

RST 599xp allows users to track their progress through its Hi-Score data. Users can capture their Hi-Score dialog and clear their data, enabling them to monitor improvements in their QSO performance over time.

### Does RST 599xp offer certifications?

RST 599xp does not offer formal certifications. Its primary purpose is to provide a realistic simulation for practicing and improving CW QSO skills for amateur radio operators.

### What is the price of RST 599xp?

RST 599xp is a paid application, available for $2.99. This one-time purchase grants access to all its simulation features.

### Does RST 599xp have ads?

No, RST 599xp is ad-free. As a paid application, it does not contain any advertisements, ensuring an uninterrupted user experience.

### What devices is RST 599xp compatible with?

RST 599xp is specifically designed for iPad. It also supports keyboard input from Apple Silicon Macs, but is not compatible with iPadOS itself.

### How often is RST 599xp updated?

RST 599xp was last updated on December 22, 2025, with version 3.1.0. This indicates a commitment to ongoing development and improvements for the application.

## Version history (last 5 releases)

### 3.1.0 — 2025-12-22

Improved stability and screen-resolution compatibility.

### 3.0.0 — 2024-09-01

Supported the German Keyboard Layout.

### 2.8.0 — 2024-01-18

Supported keyboard input from Apple Silicon Mac. (Not compatible with iPadOS)
[Support Key]
A-Z, 0-9, /
Enter:return
ESC:esc
BS:delete
CQ:UpArrow
AGN:DownArrow
TU:[
LEFT:LeftArrow
RIGHT:RightArrow

### 2.7.1 — 2024-01-14

Verified compatibility with Apple silicon.

### 2.7.0 — 2023-03-21

Updated Xcode version to latest and changed support to iOS12 or later.

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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 2026-06-03.*