How fast each character is sent. Start at 20 so you learn the sound, not the count.
Farnsworth spacing. Sets the gaps between characters when stations call you. Raise it as you improve.
Sets how long a dit lasts when you key. Lower is more forgiving.
Static on every range, and fading on the two highest.
One button. You make the timing: tap for a dit, hold for a dah.
Two buttons. Each press sends one correctly timed dit or dah.
A character is only read when you press Send it. Pair this with paddles if timed presses are hard.
The meter on the amber display fills while a signal is on, so you can read code by eye.
Works on phones that allow web pages to vibrate.
Turn off for sound-only training.
Stills the landscape and removes screen movement. Your system setting is also respected.
Optional. Once you know all its characters, a station will send it to you.
Progress is saved in this browser on this device. The game works offline after the first visit. To install it, choose Add to Home Screen from your browser’s share or menu.