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Last updated on: 2026-05-29
Android Apps > Education > J42 Morse Code Trainer
J42 Morse Code Trainer icon

J42 Morse Code Trainer

v122.23.01.21-L
Java42 Mobile
3.44
29 reviews
1,000+
Downloads
Free

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

Not recently updated — last update was on 2023-01-21. This app may no longer be actively maintained.
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About J42 Morse Code Trainer

J42 Morse Code Trainer is an education app developed by Java42 Mobile.

How many times has J42 Morse Code Trainer been downloaded?

J42 Morse Code Trainer has been downloaded 4 thousand times. In the last 30 days, the app was downloaded 1 times.

What is the rating of J42 Morse Code Trainer?

J42 Morse Code Trainer is rated 3.44 out of 5 stars, based on 29 ratings.

Is J42 Morse Code Trainer free?

J42 Morse Code Trainer is free to download. The APK download size is 9.27 MB. The latest version available is v122.23.01.21-L. The last update was on January 21, 2023.

What are the requirements for J42 Morse Code Trainer?

J42 Morse Code Trainer requires Android 4.4+ or higher. The app has a content rating of Everyone. The app has been available on Google Play April 2020.

Description
Listen to CW words, letters or groups at various speeds and formats.
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More data about J42 Morse Code Trainer

Price Free to download
Total downloads 4 thousand
Recent downloads 1
Rating 3.44 based on 29 ratings
Ranking Not ranked
Version v122.23.01.21-L
APK size 9.27 MB
Number of libraries 14
Designed for Android 4.4+
Suitable for Everyone
Ads Contains ads

App Performance Report

Get a detailed PDF report for J42 Morse Code Trainer with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more

Get PDF Report — $29

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J42 Morse Code Trainer compared with similar apps

Keywords that only this app has

Tone Speeds Optional Cues Generator Feedback Option Leave Comments Suggestions

Common keywords of similar apps

Code Morse App Cw Words Character

Keywords missing from this app

Text Learn Characters Learning Tap Wpm Send Speed Key Settings Letters Codes Sound Translate Practice Https Set Sending Recent Radio Level Hold Button Choose Prosigns Keyboard Straight Trainer Koch Translation Keypad Play Abbreviations Usb Learned Added Device Flashlight Frequency Simple Numbers Sos Interface String

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Google Play Rating history and histogram

16
0
3
0
9

Downloads over time

J42 Morse Code Trainer has been downloaded 4 thousand times. Over the past 30 days, it has been downloaded 1 times.

Changelog of J42 Morse Code Trainer

  • Jan 21, 2023UpdateVersion v122.23.01.21-L
  • Sep 3, 2022UpdateVersion v114.22.09.03-L
  • Aug 6, 2022UpdateVersion v112.22.08.06-L
  • Apr 28, 2021UpdateVersion v88.21.04.29
  • Feb 13, 2021UpdateVersion v80.21.02.13
  • Jan 25, 2021UpdateVersion v78.21.01.25
  • Jan 19, 2021UpdateVersion v70.21.01.19
  • Sep 16, 2020Installs1,000+ installs
  • Aug 13, 2020UpdateVersion v66.20.08.13
  • Jul 25, 2020UpdateVersion v45.20.07.25
  • Jul 17, 2020UpdateVersion v42.20.07.17
  • Jun 29, 2020UpdateVersion v30.20.06.29
  • Jun 9, 2020UpdateVersion v24.20.06.07
  • Jun 6, 2020UpdateVersion v23.20.04.15
  • Apr 26, 2020Installs500+ installs
  • Apr 10, 2020UpdateVersion v22.20.04.07
  • Apr 1, 2020New AppVersion v17.20.03.28 in EDUCATION for Free
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Developer information for Java42 Mobile

Java42 Mobile

java42mobile.com@gmail.com

N/A

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Comments on J42 Morse Code Trainer for Android

★★★★★ Ham01 Radio · Jul 28, 2020
Latest update works great. Now 5 star. Thanks.
★☆☆☆☆ BOUNDLESS FREEDOM · Jan 2, 2022
How in the heck is this supposed 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

Google Play Rankings for J42 Morse Code Trainer

This app is not ranked

Technologies used by J42 Morse Code Trainer

J42 Morse Code Trainer is requesting 9 permissions and is using 15 libraries.

Permissions

Network communication
view network connections, full network access, receive data from Internet
System tools
run at startup, prevent phone from sleeping
Extra
android.permission.FOREGROUND_SERVICE, android.permission.POST_NOTIFICATIONS, com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE, com.google.android.gms.permission.AD_ID

Ad network libraries

None found

Social libraries

None found

Development tools

Android Jetpack core Android Library IconAndroid Jetpack core Android Architecture Components Android Library IconAndroid Architecture Components Android Jetpack VersionedParcelable Android Library IconAndroid Jetpack VersionedParcelable Firebase Android Library IconFirebase Android Jetpack Annotations Android Library IconAndroid Jetpack Annotations Android Jetpack Widgets Android Library IconAndroid Jetpack Widgets Android Jetpack AppCompat Android Library IconAndroid Jetpack AppCompat AndroidX Activity Android Library IconAndroidX Activity Android Activity Saved State Android Library IconAndroid Activity Saved State Android Jetpack Media Android Library IconAndroid Jetpack Media Google Cloud Messaging (GCM) Android Library IconGoogle Cloud Messaging (GCM) Android WorkManager Android Library IconAndroid WorkManager AndroidX Multi-Dex Library Android Library IconAndroidX Multi-Dex Library YouTube Android Player API Android Library IconYouTube Android Player API
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Morse Code Trainer (Learn CW) icon Morse Code Trainer (Learn CW)
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