IZ2UUF Morse Koch CW

IZ2UUF

In-app purchases

About this app

- learn morse code reception on the go (train, commuting, car, walking, etc)
- supports Koch method with G4FON, LCWO or custom character sets
- supports the Farnsworth spacing (high speed characters with longer space between them)
- the hard-letters settings allow increasing the frequency of the letters harder for the user to recognize
- the auto hard-letters feature automatically increases the frequency of the letters last added to the Koch exercise
- high precision timing of dots. dashes and space
- all timings (dot/dash ratio, spacing, etc.) can be user set
- optionally different sidetone frequency for dots and dashes
- works also with the phone screen off, so execises can be done with the device in the pocket
- when an incoming call is received, the exercise is automatically paused
- a voice can can read each word after the CW transmission, to allow mentally check the reception without even looking at the screen
- international Text-to-speech can read the text after having been sent in CW
- long (alpha, bravo, etc.) or short (A, B, C, ...) voice samples are available
- a QSO generator generates random "standard" QSO using a database of 1116 first names and 544 cities related to the 31 most popular countries, with 560 real rig names, antenna types, WX and so on
- can read text from a file or copied and pasted from any source
- can transmit words or sentences randomly taken from a file (for example a list of proverbs or aphorisms)
- callsign generator with optional prefix and suffix generation
- exercise verification can be done by reading the screen, by typing the answers or by listening to a voice that dictates it
- over 100 international characters supported, including cyrillic
- full support of prosigns
- exercises can be configured and saved for fast retrieval

Ratings and reviews

I'm learning CW and am going directly to head copy, rather than pencil copy. The app is great because I can put in earbuds and practice anywhere. The only obvious feature that seems to be missing is variable word length with a user-specified max number of characters per word. I would like the challenge of variable word lengths, but with a maximum of 3 to 5 characters per word. Anything more is just too challenging for me to head copy.

Very well designed app. It's easy to use and is customizable to suit different learning styles. Through regular practice sessions with this app I'm now proficient in sending and copying Morse code, something I've wanted to accomplish for thirty years. I first downloaded it a couple of years ago and only use it while I'm on long drives to destinations where I don't need to use GPS nav (I've designed my use of the app so that is never unsafe while driving).

I loved the prior version. learned my code quickly and easily. App upgraded itself, features no longer work, and even worse is that I can't copy the morse it generates. Boo Hiss. Time to find a new app. sometimes you just need to learn when to leave good enough alone. Update: I found what changed. The old version showed the character first, then the tone; the new version presents the tone, then the character. I reset the Koch level to the start, and advanced rapidly through the sequence with about 2 minutes at each level. After a few levels, I was able to advance two or three levels at a time. My speed is back as is my comprehension. Still a couple of small issues that I've communicated to the developer; but nothing major. Upgrading from 2 stars to 4.

What's new

Now file selection uses the native Android selection box and it works on Android 33