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Last updated on: 2026-07-19
Android Apps > Education > Morse Code Trainer (Learn CW)
Morse Code Trainer (Learn CW) icon

Morse Code Trainer (Learn CW)

4.3
Claus Niesen
4.05
83 reviews
10,000+
Downloads
Free

Learn Morse code by listening

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About Morse Code Trainer (Learn CW)

Morse Code Trainer (Learn CW) is an education app developed by Claus Niesen.

Download Statistics

Morse Code Trainer (Learn CW) has been downloaded 15 thousand times. In the last 30 days, the app was downloaded 27 times.

User Ratings

Morse Code Trainer (Learn CW) is rated 4.05 out of 5 stars. The rating is based on 83 ratings.

App Information

Morse Code Trainer (Learn CW) is FREE to download. The APK download size is 2.88 MB. The latest version available is 4.3. The last update was on February 28, 2021.

Technical Requirements

Morse Code Trainer (Learn CW) requires Android 4.0.3+ or higher. The app has a content rating of Everyone. The app has been available on Google Play May 2018.

Description
**Free: no ads, no privacy intrusion, no hidden fees, fully open source**

The recommended way to learn Morse code (cw) is not by remembering dots and dashes but by remembering the sound.

This app plays character, words and phrases in Morse code, gives you a brief moment of time to recognize it and then speaks out loud the answer. Allowing you to learn Morse code without having to look at or interact with your phone. Hopefully the app helps you and me learn to copy Morse code in our heads.

Features:
* User setting to repeat character/word/phrases multiple times before going to the next one.
* User setting to give hint before/after Morse code. Allows you to practice reading and generating Morse code in your head.
* Your own custom word list (see below).
* Set speed, farnsworth spacing, pitch, and more.
* Dark mode, to match your phones theme.

The app comes with the following word lists:
* abc.txt - contains the alphabet (a to z)
* numbers.txt - contains numbers (1 to 9 and 0)
* symbols.txt - period, stoke and question mark
* abc_numbers_symbols.txt - combination of the three files above
* memory_words.txt - some memory words

The app requires write access to your device's USB storage in order to work. The directory "Claus' Morse Trainer" will be created for the words lists. The directory can be safely deleted after you uninstall the program.

You can create your own custom files with characters, words or phrases that you want to learn. Just create a text file with each character, word or phrase on a separate line. If the Morse text and spoken text is different then separate them with a vertical pipe "|". E.g.:
tu|thank you

Tip: The Google Text-to-speech engine sounds quite a bit better than the Samsung Text-to-speech engine that is enabled by default.

This app is created of love of coding and amateur radio. Done in a professional manner but purely as a hobby. To enhance your and my ability "speak" Morse code and to to operate CW on the air waves. Not only is the app free, but the source code is viewable on Github. No data is collected by the app, so there is no need for a privacy policy.

Please report any issues and errors via GitHub ( https://github.com/cniesen/morsetrainer ). Ideas and code contributions to improve the Morse code trainer are welcome as well.

73, Claus (AE0S)

Formerly known as: Claus' Morse Trainer

Recent changes:
Added vocalize setting to turn on/of spoken text.
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More data about Morse Code Trainer (Learn CW)

Price Free to download
Total downloads 15 thousand
Recent downloads 27
Rating 4.05 based on 83 ratings
Ranking Not ranked
Version 4.3
APK size 2.88 MB
Number of libraries 5
Designed for Android 4.0.3+
Suitable for Everyone
Ads NO ads

App Performance Report

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Morse Code Trainer (Learn CW) compared with similar apps

Common keywords of similar apps

Word Phrases Setting Claus Free Privacy Source Remembering User Custom Lists Files Directory Created Create Separate Spoken Speech Engine Github Morse Code App Learn Text Trainer Words Cw Character

Keywords missing from this app

Speed Characters Learning Practice Button Key Codes Real Send Tap Sound Translate Transmission Letters Audio Translation Translator Telegraph Light Prosigns Wpm Settings Time Recent Abbreviations Straight Vibration Sending Alphabet Paddle Copy Play Tool Decode Features Keyboard Numbers Ads Section Screen Flashlight

Google Play Rating history and histogram

Rating history
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56
7
0
3
15

Downloads over time

Downloads over time
Subscribe to see download velocity and history

Morse Code Trainer (Learn CW) has been downloaded 15 thousand times. Over the past 30 days, it has been downloaded 27 times.

Changelog of Morse Code Trainer (Learn CW)

Show changelog

Developer information for Claus Niesen

Claus Niesen

claus@niesens.com

Website

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Address:

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Comments on Morse Code Trainer (Learn CW) for Android

★★★★★ Good Morse code trainer. Exactly the type I've been looking for. Would be good method for the blind as you hear both the code and the letter, number or symbol. Only problem is the voice is not always clear as to what the letter is, V and B sound alike as do some other letters.
★★★★★ What I was looking for audio only for hands-free repetition. Only used it for 20 minutes so far, but it looks like a person could make a .txt with letters they want to focus on. (My brain's baud is too slow for 26 characters)
★★☆☆☆ It is asking for permission to media and files. Other apps don't need this, and I don't see why this one asks for them. I see someone else raised this issue and the developer posted a shady explanation about storing files of letters. I don't believe it. Edit after the developer's reply: listen to the feedback users give instead of being condescending. Other apps with denied permission simply post a notification that the feature for which the permission was required will be disabled.
★★☆☆☆ Why does this require access to my photos, media, and files? I denied access, and it would not let me use the program. Obviously, I uninstalled.
★★☆☆☆ Need help with vocalizations and sequence. Plays once, no vocalization, then stops. Have to press stop then start and same result.
★★☆☆☆ Doesn't sound automatically the whole sound file, just one word, and that's it. . .

Google Play Rankings for Morse Code Trainer (Learn CW)

This app is not ranked

Technologies used by Morse Code Trainer (Learn CW)

2 permissions · 5 libraries
Subscribe to see full permission and library details
Morse Code Complete: Learn CW icon Morse Code Complete: Learn CW
MorseKit: Morse Code Trainer icon MorseKit: Morse Code Trainer
Morse Code: Learn, Translate icon Morse Code: Learn, Translate
10 WPM CW Morse code trainer icon 10 WPM CW Morse code trainer
Morse icon Morse
Morse Code Generator & Trainer icon Morse Code Generator & Trainer
Morse Code Learn and Translate icon Morse Code Learn and Translate
Morse Mania: Learn Morse Code icon Morse Mania: Learn Morse Code

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