J42 Morse Code Trainer

Name: J42 Morse Code Trainer
Rating: 3.5 (33 reviews)
Author: Java42 Mobile

By: Java42 Mobile

App for novice or experienced ham radio operators interested in Morse code.

Features & Capabilities

Listen to CW words, letters or groups at various speeds and formats.

Designed to make it easy to recognize Morse code characters at various speeds.

Improve existing CW skills for those who already know the code.

Code oscillator outputs tones from 5 to 39 words per minute.

Tone frequency is adjustable from 500 Hz to 2.9 kHz.

Choose from Over 100 programmed character sequences.

Optional alphanumeric cues.

Optional voice cues.

Loop mode plays the selected character sequence continuously.

Optionally disable the tone generator for visual training.

Use the in-app feedback option to leave comments and suggestions or to request enhancements.

User Growth & Download Statistics

App

By:

Downloads:

Rating:

Version:

v122.23.01.21-L Last updated: 2023-01-22

Version code:

122

Creation date:

2020-02-06

Publisher country:

Permissions:

com.google.android.gms.permission.AD_ID Moderate risk
android.permission.FOREGROUND_SERVICE Low risk
android.permission.INTERNET Low risk
android.permission.POST_NOTIFICATIONS Low risk
android.permission.RECEIVE_BOOT_COMPLETED Low risk
android.permission.WAKE_LOCK Low risk
com.google.android.c2dm.permission.RECEIVE Low risk
com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE Low risk
android.permission.ACCESS_NETWORK_STATE Safe

Size:

9.27MB

Email:

ja*****@gmail.com

URLs:

Full description:

Source:

Google Play Store

Data ingested on:

2026-06-08

Compare stats and ranking:

Ranking

# 738,992 ▼ 3,699

For Developers

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Contact the developer

Chrome-Stats does not own this Android app. Please use these information below to contact the Android app developer.

Developed by:

Java42 Mobile

Google Play Store

https://play.google.com/store/apps/details?id=com.java42.tools.j42morsecodetrainer

Email:

ja*****@gmail.com

Publisher Change History

2025-07-04: an*****@java42.com to ja*****@gmail.com

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User Reviews

How in the heck is this supposssd to work ? how do ypu start ? got as far as my call sign but cant figure the resf out. Look elsewhere for a code trainer

BO*****, 2022-01-02

Latest version audio quality vastly superior to previous versions. They also added two volume controls. One for tones, one for voice. Super easy to balance tone/voice now. Looks like the pop filter has been removed but I never used that function. There are a few extra modules to select but basically the same set. Custom characters usage is unchanged.