Feld Hellschreiber1.2
Publisher Description
Hellschreiber is a teleprinter system, developed in the 1920s, that transmits text via sound, much like an old facsimile (fax) system. Each pixel of a character is transmitted as a short burst of audio. It works even under very noisy and poor reception conditions, because your brain does the work of analyzing the received image to pick out the characters.
It was used by the German military during World War II to send messages encrypted by ENIGMA machines. Today it is used by amateur (ham) radio operators around the world to send messages to each other via shortwave radio.
Feld Hellschreiber literally means "bright field recorder". Hellschreiber is sometimes referred to as simply Hell.
Feld Hellschreiber lets you decode and transmit Feld Hell messages. Decoded text is continuously scrolled across the top of the display. You can type in text to transmit, or press a button to easily send canned text messages, such as CQ calls. Sound is picked up from your radio's speaker via the internal mic in your device, and transmitted audio comes out the speaker - you can also connect a patch cable to your radio's mic input via the headphone jack on your device to transmit the audio, if you wish.
The slider control adjusts the display contrast, and the indicator to the right shows the volume. Adjust the slider for the best display.
To transmit text, touch on the text entry field, and start typing. Each character will be sent when possible. When sent, it will be taken off the left end of this field, and displayed on the right end of the transmitted text field, to the left of the entry field, in a scrolling fashion.
Canned text buttons are also available, touch one to send the text stored for that button. To edit a button, touch the Setup button, and then select the button you wish to edit. You can edit the name of the button, as well as the text.
To decode transmissions, you just need to run the app, and set it near the radio's speaker or headphones, and watch the decoded text appear. It's that easy!
Version History Updates for iOS 10.3 1.2 05/08/2017 Bug fixes for iOS 8. 1.1 09/24/2014 Corrected several bugs that could cause a crash. 1.0.1 09/11/2013 1.0.0 05/28/2013
About Feld Hellschreiber
The company that develops Feld Hellschreiber is Black Cat Systems. The latest version released by its developer is 1.2.
To install Feld Hellschreiber on your iOS device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2026-10-14 and was downloaded 3 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the Feld Hellschreiber as malware if the download link is broken.
How to install Feld Hellschreiber on your iOS device:
- Click on the Continue To App button on our website. This will redirect you to the App Store.
- Once the Feld Hellschreiber is shown in the iTunes listing of your iOS device, you can start its download and installation. Tap on the GET button to the right of the app to start downloading it.
- If you are not logged-in the iOS appstore app, you'll be prompted for your your Apple ID and/or password.
- After Feld Hellschreiber is downloaded, you'll see an INSTALL button to the right. Tap on it to start the actual installation of the iOS app.
- Once installation is finished you can tap on the OPEN button to start it. Its icon will also be added to your device home screen.
Program Details
System requirements
Download information
Pricing
Version History
version 1.2
posted on 2026-10-14
Version History Updates for iOS 10.3 1.2 05/08/2017 Bug fixes for iOS 8. 1.1 09/24/2014 Corrected several bugs that could cause a crash. 1.0.1 09/11/2013 1.0.0 05/28/2013
version 1.2
posted on 2026-09-05
Version History This app has been updated by Apple to prepare for watchOS 27 compatibility. No new features are included.
Updates for iOS 10.3 1.2 05/08/2017 Bug fixes for iOS 8. 1.1 09/24/2014 Corrected several bugs that could cause a crash. 1.0.1 09/11/2013 1.0.0 05/28/2013
version 1.2
posted on 2026-08-26
Version History This update from Apple will improve the functionality of this app. No new features are included.
Updates for iOS 10.3 1.2 05/08/2017 Bug fixes for iOS 8. 1.1 09/24/2014 Corrected several bugs that could cause a crash. 1.0.1 09/11/2013 1.0.0 05/28/2013
version 1.2
posted on 2017-05-08
May 8, 2017
Version 1.2
This app has been updated by Apple to display the Apple Watch app icon.
Updates for iOS 10.3
version 1.2
posted on 2017-05-08
This app has been updated by Apple to display the Apple Watch app icon.
Updates for iOS 10.3
