01
Koch method
Listen at full speed and add one character at a time.
Listen at practical character speed from the start, and add new characters one at a time as you improve. Type each symbol as you hear it.
All apps
Education
iOS · Android
DS1UOV's Morse Trainer
Koch training where accuracy unlocks the next character
Build CW reception from a small character set, unlocking the next symbol only after consistent accuracy proves you are ready.
Free download code for studentsKoch
Method
90%
Target accuracy
Local
Progress
Screenshots
4 screenshots
DS1UOV's Morse Trainer,
screen by screen
02
Error analysis
See which characters you confused.
Sent code and your answers are shown side by side, along with which characters you heard as something else. You can see what to practice to reach the 90% target.
03
Audio control
Adjust speed, tone and session length.
Adjust character speed, effective speed, tone frequency, session length and difficulty separately. Training works the same way from the first characters up to 30 WPM.
Made for
People with a particular need.
01
Beginners starting CW reception
02
Learners eliminating recurring symbol confusion
03
Structured learners who value measurable progress
Privacy & note
Training works without an account, with progress stored locally on the device.
FAQ
Asked before downloading.
- Size
- 30 MB
- Age rating
- 4+
- Minimum iOS
- 15.6
What is the Koch method?
You keep a practical character speed from day one and expand only the symbol set, so you never learn to depend on slow code.
How does the next level unlock?
A new character unlocks only once you hit the target accuracy. Sent and entered text are compared so confusion patterns stay visible.
Can I revisit earlier stages?
Return to any unlocked set to strengthen weak symbols, with progress and settings resets kept separate.
Get the app
Download DS1UOV's Morse Trainer
v1.0.17 · 30 MB · iOS 15.6+ · Android
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