OpenShack RufzXP TX
Copy callsigns, build CW speed
$4.99
One callsign at a time. Copy by ear or practise sending. Check your answers, WPM and points after each run.
One callsign at a time, at increasing speed. OpenShack RufzXP TX sends amateur-radio callsigns in CW for you to copy on the keyboard or send back with a paddle.
In keyboard mode, type the callsign you copied and press Enter. In paddle mode, key it back with the on-screen paddle or your own paddle connected through an OpenShack Box.
Correct copies raise the WPM and missed callsigns bring it down according to your settings. Choose the starting speed, run duration, repeats and how the speed changes. Farnsworth spacing is available for practice.
After the run, review each callsign alongside your answer, the WPM and the points earned. Your best WPM is the highest speed at which you actually copied a callsign correctly. Personal bests are saved on your device.
If you want to compare with other operators, publish completed scores under your callsign to the OpenShack leaderboards. Keep publishing manual, ask after each run, or explicitly enable automatic publishing.
Practice and the included callsign list work offline. No OpenShack account is needed. Internet access is required for online scores, Network Box connections and website links.
Use your own paddle with an optional OpenShack Box, sold separately. Connect through Bluetooth LE or Wi-Fi and the internet (Network Box). Compatible firmware is required. USB serial connections are not supported on iOS.
English interface for iPhone and iPad. One app purchase, no subscription. About links to help and other OpenShack CW apps.
OpenShack CW by DL2CC.
Raise media volume to hear CW; Silent Mode may stay enabled. Practice stops when the app enters the background or the device locks.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Removed background noise between CW elements and callsigns. Tone, timing and your saved settings stay the same.
The developer, Frank Grossmann e.K., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- User Content
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Grossmann GmbH
- Size
- 5.6 MB
- Category
- Education
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Frequent
Contests
Contains
User-Generated Content
- Copyright
- © 2026 Grossmann GmbH
