Koch Trainer

Lesson 1 / 40 — reach 90% over your last 30 answers to unlock the next character.

Rolling accuracy
0% / 90%
Window filled
0 / 30
Session
100% combo ×0
0 / 0 correct
?
Press start (or hit space) and identify what you hear.

Best trained eyes-free: type the letter on your keyboard the moment you recognize it — a chirp means correct, a low buzz means wrong (the missed character replays). Space starts/replays.

73 DE MORSEY ·-·-· CW trainer — Koch method · Farnsworth timing GitHub