DS1UOV's Morse Trainer w/ Koch

DS1UOV's Morse Trainer w/ Koch

Koch Method Morse Code Trainer

0 ratings
3 reviews
$9.99

Details

  • Released
  • Updated
  • September 26, 2025
  • May 19, 2026

Features

DS1UOV's Morse Trainer w/ Koch screenshot #1 for iPhone
DS1UOV's Morse Trainer w/ Koch screenshot #2 for iPhone
DS1UOV's Morse Trainer w/ Koch screenshot #3 for iPhone
DS1UOV's Morse Trainer w/ Koch screenshot #4 for iPhone
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About

This app offers structured Morse code training using the Koch method, focusing on measurable skill improvement. It features performance-based progression, a detailed progress dashboard, and customizable practice settings for efficient learning.

Koch method progression
Performance-based level advancement
Progress dashboard and level selection
Customizable practice settings
Distraction-free training UI
Detailed results and error analysis
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What's New in DS1UOV's Morse Trainer w/ Koch

1.0.15

May 19, 2026

feat: Added the ability to preview symbol sounds before starting a session. feat: Enabled auto-scroll in the input field to ensure entered text remains visible.

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User reviews

Most effective way to learn CW like LCWO

This app is perfect as it has everything that other apps are missing. It uses the Koch method instead of instant character recognition, it has the LCWO letter order which is proven to be most efficient, it allows you to set a separate character feed and effective speed, and it lets you practice full words and callsigns. The UI is really nice and easy to use, it's as if the author made the famous LCWO into a user-friendly mobile app!

Only comments: the app should not allow the user to select a character speed of
less than 25WPM (effective speed of less than that is of course okay). And I think it should give the user 2 stars for 15WPM and 3 stars for 15WPM at 1 minute, but this is a tiny detail.

Thank you so much for making this!
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How do I get a refund.

The key board function is very clunky and non responsive. I would like a refund

Response from developer

We are sorry for the inconvenience you've experienced. Based on our internal testing, the keyboard function is operating normally; however, performance issues can sometimes occur due to specific device environments or background app conflicts. ​We recommend trying to [Settings > Reset App] to see if that resolves the issue. If the problem persists, please contact us at support@commonsourcelab.com with your device model and OS version. We will investigate this immediately to provide a solution. Regarding refunds, please follow the standard procedure provided by the App Store, as all transactions are managed by them directly.

Effective speed doesn’t work

I like that the letters match lcwo.net but the effective speed setting does nothing. Setting 25/5 or 25/10, it still does 25/25. It’s a fine app if you don’t want to use Farnsworth spacing, I guess.

Response from developer

​Thanks for the input. We're reviewing the feature now. ​Please note that our Farnsworth implementation specifically targets the spacing between groups. While the 5 characters in a group maintain the character speed (e.g., 25 WPM), the pause before the next group starts should be significantly longer. ​Is the interval between these groups still appearing too short for you? We’ll do another internal check to be sure.

Developer apps

FAQ

What is the Koch method used in DS1UOV's Morse Trainer?

The Koch method involves learning Morse code characters one by one, starting with a small set and gradually adding more as your accuracy improves. DS1UOV's Morse Trainer implements this by requiring a 90% accuracy threshold before unlocking the next character.

How does DS1UOV's Morse Trainer track progress?

The app features a progress dashboard that visually displays your current level, highest unlocked level, and overall completion percentage. You can also select any unlocked level to review and reinforce previously learned characters.

Can I customize my practice sessions in DS1UOV's Morse Trainer?

Yes, you can adjust session settings such as tone frequency and speed. The app also provides built-in presets ranging from beginner to expert to help you start quickly with sensible defaults.

What kind of feedback does DS1UOV's Morse Trainer provide?

After each session, you'll receive detailed results including accuracy percentage and feedback on whether you met the advancement threshold. You can also review side-by-side comparisons of transmitted text versus your input to identify errors and inspect mistake statistics for commonly confused characters.

Does DS1UOV's Morse Trainer support physical keyboard input?

Yes, the app supports physical keyboard input, which can enable more realistic practice, especially on tablets or when using external keyboards. The input grid is automatically limited to characters available at your current level.

What are the reset options in DS1UOV's Morse Trainer?

You have the option to reset only your Koch training progress, which restarts you from level 1 while preserving your settings. Alternatively, you can reset all settings back to their default values if needed.

What devices is DS1UOV's Morse Trainer compatible with?

DS1UOV's Morse Trainer is compatible with iPhone, iPad, and iPod devices. It is rated for ages 4 and up.

How often is DS1UOV's Morse Trainer updated?

The latest version of DS1UOV's Morse Trainer is 1.0.14, and it was last updated on March 5, 2026. This indicates a relatively recent update frequency.