About Koch Trainer
Koch Trainer is a morse code trainer that uses the Koch Method developed by the German psychologist Ludwig Koch in the 1930's. The method basically states that you should learn morse code at the speed you expect to...
Koch Trainer is a morse code trainer that uses the Koch Method developed by the German psychologist Ludwig Koch in the 1930's. The method basically states that you should learn morse code at the speed you expect to receive, by training your reflexes to respond to code sent at 20 WPM you'll learn the code much faster. Thank you and 73, Nick N3WG
Version History This update from Apple will improve the functionality of this app. No new features are included. Bug fixes for iOS 8 on iPhone. 3.5 10/03/2014 Bug fix for Display Played Morse Code switch. 3.4 06/02/2014 Fixed issue with lesson selection on iOS 7. 3.3 06/01/2014 Added QSO mode. Made random callsigns more lifelike. 3.2 05/25/2014 Fixed issue with keyboard blocking the Play button on iPhone. 3.1 07/23/2013 * Morse is now generated on the fly, no more waiting for the entire string of morse code to be generated. Total word limit restriction removed since we're not relying on memory limits any more. * Five second delay before starting code playing * Callsigns mode added. 3.0 07/19/2013 Fixed landscape mode on iPad Inserted short period of silence before playing code 2.4 07/04/2013 Added the ability to play random words. 2.3 03/18/2013 Added an Alert View to explain that no audio will play if the device is muted to address the negative reviews. 2.2 09/26/2012 Fixed the text for 90% proficiency in the Info view Added some further explanation on the Info view Cleaned up some UI issues, like scrolling the output field when the words run over the bottom edge. 2.1 05/09/2012 * Complete rewrite of how morse is generated, should fix crashes. * Added the ability to specify the number of "words" to create. Words are random length, between 1 and 5 characters. * Implemented save/restore of WPM, freq and words count. * Got rid of pause button, now uses play button to start/pause/play * Input fields use correct keyboard (number) now * Save/restore for last lesson played * Added rotation for iPad *** If this version of the app crashed on you, please email me at
[email protected]. 2.0 03/10/2012 Bug fix for older devices 1.5 10/21/2011 v1.4: Fixed bug in lessons displayed Fixed bug in running out of memory when playing at a slow speed v1.3: Made app universal to support iPad natively. Increased silence at beginning of audio stream when play is pushed to 3 seconds Bug fix to increase stability Doubled the number of words randomly generated 1.4 08/30/2011 Made app universal to support iPad natively. Increased silence at beginning of audio stream when play is pushed to 3 seconds Bug fix to increase stability Doubled the number of words randomly generated 1.3 08/19/2011 * While morse is playing, the app disables the idle timer for locking the screen. 1.2 01/05/2011 Clear button added to scratchpad. 1.1 12/14/2010 1.0 11/30/2010
Previous Versions
Here you can find the changelog of Koch Trainer since it was posted on our website on 2016-09-27 23:03:27.
The latest version is 3.5 and it was updated on 2026-06-20 05:49:03. See below the changes in each version.
Koch Trainer version 3.5
Updated At: 2026-06-20
Changes: Version History This update from Apple will improve the functionality of this app. No new features are included.
Bug fixes for iOS 8 on iPhone. 3.5 10/03/2014 Bug fix for Display Played Morse Code switch. 3.4 06/02/2014 Fixed issue with lesson selection on iOS 7. 3.3 06/01/2014 Added QSO mode.
Made random callsigns more lifelike. 3.2 05/25/2014 Fixed issue with keyboard blocking the Play button on iPhone. 3.1 07/23/2013 * Morse is now generated on the fly, no more waiting for the entire string of morse code to be generated. Total word limit restriction removed since we're not relying on memory limits any more.
* Five second delay before starting code playing
* Callsigns mode added. 3.0 07/19/2013 Fixed landscape mode on iPad
Inserted short period of silence before playing code 2.4 07/04/2013 Added the ability to play random words. 2.3 03/18/2013 Added an Alert View to explain that no audio will play if the device is muted to address the negative reviews. 2.2 09/26/2012 Fixed the text for 90% proficiency in the Info view
Added some further explanation on the Info view
Cleaned up some UI issues, like scrolling the output field when the words run over the bottom edge. 2.1 05/09/2012 * Complete rewrite of how morse is generated, should fix crashes.
* Added the ability to specify the number of "words" to create. Words are random length, between 1 and 5 characters.
* Implemented save/restore of WPM, freq and words count.
* Got rid of pause button, now uses play button to start/pause/play
* Input fields use correct keyboard (number) now
* Save/restore for last lesson played
* Added rotation for iPad
*** If this version of the app crashed on you, please email me at
[email protected]. 2.0 03/10/2012 Bug fix for older devices 1.5 10/21/2011 v1.4:
Fixed bug in lessons displayed
Fixed bug in running out of memory when playing at a slow speed
v1.3:
Made app universal to support iPad natively.
Increased silence at beginning of audio stream when play is pushed to 3 seconds
Bug fix to increase stability
Doubled the number of words randomly generated 1.4 08/30/2011 Made app universal to support iPad natively.
Increased silence at beginning of audio stream when play is pushed to 3 seconds
Bug fix to increase stability
Doubled the number of words randomly generated 1.3 08/19/2011 * While morse is playing, the app disables the idle timer for locking the screen. 1.2 01/05/2011 Clear button added to scratchpad. 1.1 12/14/2010 1.0 11/30/2010
Koch Trainer version 3.5
Updated At: 2014-10-03
Changes: Oct 3, 2014 Version 3.5
Bug fixes for iOS 8 on iPhone.
Koch Trainer version 3.5
Updated At: 2014-10-03
Changes: Oct 3, 2014 Version 3.5
This app has been updated by Apple to use the latest Apple signing certificate.
Bug fixes for iOS 8 on iPhone.
Koch Trainer version 3.5
Updated At: 2014-10-03
Changes: Oct 3, 2014
Version 3.5
This app has been updated by Apple to display the Apple Watch app icon.
Bug fixes for iOS 8 on iPhone.
Koch Trainer version 3.5
Updated At: 2014-10-03
Changes: This app has been updated by Apple to display the Apple Watch app icon.
Bug fixes for iOS 8 on iPhone.
Koch Trainer version 3.5
Updated At: 2010-11-30
Koch Trainer version 3.5
Updated At: 1970-01-01
Changes: 2014年10月3日 Version 3.5
This app has been updated by Apple to use the latest Apple signing certificate.
Bug fixes for iOS 8 on iPhone.
Disclaimer
Official App Store Link
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