KeyerLab: Learn Morse Code

KeyerLab is built for radio amateurs who want to learn CW from scratch and build real speed.

SENDING
• Practice with on-screen touch paddles or your own paddle via a USB-TTL adapter + OTG cable (CP210x, CH340, FTDI, PL2303).
• Iambic A, Iambic B and straight key modes; click-free sidetone, adjustable speed and pitch.
• Target letters appear as tiles that light up green or red as you send.
• Timing analysis: your letter and word spacing and dah/dit ratio are measured, with a paper-tape view and tips.

KOCH METHOD
• Start with two letters at full speed. Reach 90% over the last 50 characters and the next letter is added automatically.
• Your weak letters come up more often.

COPY TRAINING
• The app sends, you type. Farnsworth spacing lets you learn at a high character speed.
• Sources: Koch letters, weak letters, callsigns, words, abbreviations, Q-codes and QSO phrases.
• Instant character recognition (ICR): a single letter is sent, you press its key; your reaction time is measured and slow letters come back more often.
• Real band conditions: adjustable noise, QSB (fading) and a second station nearby (QRM).

CONTEST MODE
• Callsigns one after another: copy correctly and the speed goes up, miss and it drops. Score, personal best and history.

QSO SIMULATOR
• The app plays the other station: it calls CQ, gives a report and signs off. You answer with your paddle.
• The letter being sent is shown large and highlighted in the text.

CW DECODER
• Turns Morse from the microphone or line-in (your receiver's audio output) into text.
• Finds the pitch and speed automatically; spectrum and signal meter included.

PROGRESS
• Daily goal, practice streak and badges.
• Daily practice time, accuracy and speed charts; per-letter accuracy table.

English and Turkish interface, dark and light themes. Free; remove ads with a one-time purchase.
73!