# RST SEAL — CW QSO Trainer

> CW QSO trainer for ham radio beginners to practice simulated radio communications. (iPhone/iPad app by koji kamogawa.)

- Source: https://appshunter.io/ios/app/rst-seal/id1535376410 (this page in markdown: same URL + `.md`)
- Developer: [koji kamogawa](https://appshunter.io/developer/1488210713)
- Category: Education, Utilities
- Price: Free
- Rating: 4.50/5 from 2 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 9 MB
- Languages: American English
- Released: 2020-10-13
- Data updated: 2026-08-22
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/rst-seal/id1535376410/reviews.md

## What is RST SEAL?

This app is a CW QSO Trainer App for CW beginner of Ham Radio.
You can select various information from CALL, RST, Name, QTH, Rig/Ant and Age/WX by random.
This allows you to experience the actual QSO communication content in a simulated manner.

Default OP Name is "OM", please touch/input your Name by software keyboard.
Start with the "START" button.
Repeat the previous with the "AGAIN" button.
Check the FREQ SPEED and VOL the "VVV" button.

[CheckBox]
CALL: 
 You will hear a Callsign, enter the callsign and press Enter.
RST:
 You will hear the RST Report, enter the Report and press Enter.
NAME:
 You will hear the OP Name, enter the Name and press Enter.
QTH:
 You will hear the QTH of OP, enter the QTH and press Enter.
RIG/ANT:
 You will hear the Rig or Antenna of OP, enter the Rig/Antenna and press Enter.
AGE/WX:
 You will hear the Age or WX(Weather) of OP, enter the Age/WX and press Enter.
QRN:
 GRN is ON/OFF of the background Signal Noise.
Entity:
 You can choose W/W, JA or US.
FuzKey:
 Fuzzy Keying like a Straight Key.

[Slider]
FREQ.:
 You can choose the tone of CW.
SPEED:
 You can choose the speed of CW.
VOL.:
 You can choose the sound level of CW.

[Demo Video URL]
https://youtu.be/fcRPz94sga8

Supported keyboard input from Apple Silicon Mac. 
[Support Key]
A-Z, 0-9, /
Enter:return
BS:delete
START:UpArrow
AGN:DownArrow
LEFT:LeftArrow
RIGHT:RightArrow

## Key features

- Simulated QSO communication
- Randomized QSO elements (Call, RST, Name, QTH)
- Adjustable frequency, speed, and volume
- Noise (QRN) ON/OFF
- Entity selection (W/W, JA, US)
- Fuzzy keying option

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/rst-seal/id1535376410/reviews.md

### 1/5 — 使い方もよくわからない

*2021-10-27*

ダウンロードして使おうとしましたがまともに動かない。そく削除した。

**Developer response:** 使い方は、アマチュア無線のCW通信の多少の知識があれば直ぐに判るレベルです。
（AppStoreレビューの欄にも説明文を記載しています）
iOS14.8以前までは正常に動作しています。
iOS15では正常に動作しないため、現在対策検討中です。
-----
Ver2.6.1で、iOS15に対応しました。
-----
もう一度、使って頂き、再評価頂ければ助かります。

### 3/5 — 揺らぎ受信は、一気に難易度アップ

*2021-06-28*

実際の受信では縦振り電鍵で癖のある打鍵をされる方もいらっしゃるので実践に即した受信練習ができるので助かります。もう少しこれで学んで交信できたら良いなと思います。 

リグ、アンテナ、天気　年齢は、agn ボタンを押す度に内容が変わってしまう様です。

**Developer response:** コメントありがとうございます。
リグ、アンテナ、天気　年齢でデータ更新処理問題をVer2.5で対策しました。
-----
特にコメントバック頂けれておりませんが、その後の状況は如何でしょうか。

### 4/5 — Sound output stopped

*2021-06-22*

It was working. After I entered my callsign into OP box, the app stopped outputting sound.

Weird after I got your response it started working again. Even your other apps started working too

**Developer response:** I tried several times, however no reproduce. please try uninstall and install again.
The App Store certification process is good, so I don't think it will go through very bad bugs.

## Frequently asked questions about RST SEAL

### What is RST SEAL used for?

RST SEAL is a CW QSO Trainer App designed for beginners in Ham Radio. It allows users to practice simulated radio communications by randomly selecting various elements of a QSO, such as callsigns, RST reports, names, and locations.

### How does RST SEAL help beginners learn?

It provides a simulated environment to experience actual QSO communication content. Users can practice listening to and entering callsigns, RST reports, names, and QTH, helping them build essential skills for real-world ham radio interactions.

### Can I customize the training in RST SEAL?

Yes, you can customize the training experience. Sliders allow you to adjust the frequency tone, CW speed, and volume. You can also toggle background signal noise (QRN) on or off and select specific entities like W/W, JA, or US.

### What input methods are supported by RST SEAL?

RST SEAL supports keyboard input, including for Apple Silicon Macs. Specific keys like Enter, Backspace, and arrow keys are mapped to functions like starting a new QSO, deleting input, and navigating. It also features fuzzy keying for a more realistic straight key feel.

### What is the age rating for RST SEAL?

RST SEAL has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger learners interested in ham radio.

### On which devices can I use RST SEAL?

RST SEAL is available for iPhones and iPods. It is designed to run on these iOS devices, providing a portable training solution.

### Does RST SEAL have ads?

Yes, RST SEAL contains advertisements. As an ad-supported application, it displays ads to support its development and availability.

### How often is RST SEAL updated?

The latest version of RST SEAL is 3.3.0, last updated on January 22, 2024. This indicates regular updates to improve functionality and address any issues.

## Version history (last 5 releases)

### 3.3.0 — 2024-01-22

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

### 3.2.0 — 2023-05-02

Updated Admob SDK.

### 3.1.0 — 2022-12-07

Updated info.plist file.

### 3.0.0 — 2022-09-22

Suppressed activation of the software keyboard when displaying usage documents.

### 2.9.0 — 2022-09-19

Added usage documentation.
Minor fixes.

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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

## Related topics

[cw trainer](https://appshunter.io/ios/topics/cw-trainer)

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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 2026-08-22.*