CW Trainer by Wisco Radio Labs — learn Morse code (CW) the way hams actually use it, from your first two characters to a full on-air contact. Fully offline. No account, no network, no ads.
• Koch-method lessons — every character at full speed from lesson one, with Farnsworth spacing; a new character unlocks at 90% accuracy.
• A six-rung copy ladder — single characters, pairs, random groups, ham words, callsigns, and full QSO phrases.
• Sending practice with a built-in decoder that shows exactly what your fist sends — plus fist feedback that scores your estimated speed, dit/dah weighting, and element, character, and word spacing against the standard. Eight drill categories climb from common words to callsigns. Key with an iambic paddle (Mode A or Mode B), a straight key, the on-screen key, the keyboard, or your own key through a USB adapter (VBand-compatible — the [ and ] keys). Send the HH "start over" prosign just like on the air.
• A QSO simulator with POTA, SOTA, IOTA, and ragchew contacts — pick your role (activator, hunter, chaser, or call/answer CQ), with on-air break-in fills, honest signal reports, varied CQ calls, and a 5-second "get ready" countdown before the code starts.
• Cross-session progress tracking — your lessons, sending, copy, and QSO accuracy (both how you copy and how you send) are saved and shown as color-coded bar charts with a 90% mastery line and dates, so you can see whether today beat last week.
• A responsive layout that spreads across a desktop screen and collapses to a clean single column on a small one.
• Realistic band conditions — selectable receiver filtering (wide / CW 500 Hz / APF), QSB fading, and AGC.
• Reference guides on CW lingo, on-air procedure, and the history of the code.
What's new — from K9MTE:
• A color-coded Progress view — bar charts with a 90% mastery line across Learn, Key, Copy, and now QSO (tracking both your copy and your sending, per contact).
• Your sending grades itself the moment you finish an over — no button to press.
• Faster speeds (up to 40 wpm); the copy box auto-focuses when it's your turn to type; Iambic Mode B for paddle operators.
• A long list of fixes and polish.
This is actively developed — I'm a ham building the trainer I always wanted, and there's more on the way. 73, K9MTE.
Made in the Driftless by Wisco Radio Labs (K9MTE). GPL-3.0 · open source · fully offline.
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Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
Snap is available for Red Hat Enterprise Linux (RHEL) 8 and RHEL 7, from the 7.6 release onward.
The packages for RHEL 7, RHEL 8, and RHEL 9 are in each distribution’s respective Extra Packages for Enterprise Linux (EPEL) repository. The instructions for adding this repository diverge slightly between RHEL 7, RHEL 8 and RHEL 9, which is why they’re listed separately below.
The EPEL repository can be added to RHEL 9 with the following command:
sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm
sudo dnf upgrade
The EPEL repository can be added to RHEL 8 with the following command:
sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
sudo dnf upgrade
The EPEL repository can be added to RHEL 7 with the following command:
sudo rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
Adding the optional and extras repositories is also recommended:
sudo subscription-manager repos --enable "rhel-*-optional-rpms" --enable "rhel-*-extras-rpms"
sudo yum update
Snap can now be installed as follows:
sudo yum install snapd
Once installed, the systemd unit that manages the main snap communication socket needs to be enabled:
sudo systemctl enable --now snapd.socket
To enable classic snap support, enter the following to create a symbolic link between /var/lib/snapd/snap and /snap:
sudo ln -s /var/lib/snapd/snap /snap
Either log out and back in again or restart your system to ensure snap’s paths are updated correctly.
To install CW Trainer, simply use the following command:
sudo snap install wr-cw-trainer
Browse and find snaps from the convenience of your desktop using the snap store snap.
Interested to find out more about snaps? Want to publish your own application? Visit snapcraft.io now.