IZ2UUF Morse Koch CW app icon

IZ2UUF Morse Koch CW

Morse code training application.

IZ2UUF · net.iz2uuf.cwkoch

Not rated yet 100K+ downloads v2.0.43330.0 4.4 MB Android 6.0+ PEGI 3 · Everyone

  • Signature matches the Google Play version Details

At a glance

Latest version
v2.0.43330.0 (200433300)
Updated
Aug 7, 2026 (2 months ago)
APK size
4.4 MB
Requires
Android 6.0+ (API 23)
CPU support
x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category
Communication (app)
Listed since
Dec 14, 2022 (at least)
Permissions
5 (1 sensitive)
Website
iz2uuf.net/cw
Developer contact
[email protected]
Privacy
Developer's privacy policy

About this APK

IZ2UUF Morse Koch CW is an app by IZ2UUF in the Communication category, listed since at least December 2022. It includes native code for x86 32-bit, x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.

Since version 2.0.36538, the minimum Android version rose from 4.1 to 6.0. It asks for 5 permissions, 1 of them sensitive: read phone status and identity. It asks for the same permissions as version 2.0.36538. The app offers in-app purchases through Google Play.

What's new in v2.0.43330.0

Removed PayPal option to comply to Google Play policy

Description

From the listing uploaded by “appupdater”.

- learn morse code reception on the go (train, commuting, car, walking, etc) - supports Koch method with G4FON, LCWO or custom character sets - supports the Farnsworth spacing (high speed characters with longer space between them) - the hard-letters settings allow increasing the frequency of the letters harder for the user to recognize - the auto hard-letters feature automatically increases the frequency of the letters last added to the Koch exercise - high precision timing of dots. dashes and space - all timings (dot/dash ratio, spacing, etc.) can be user set - optionally different sidetone frequency for dots and dashes - works also with the phone screen off, so execises can be done with the device in the pocket - when an incoming call is received, the exercise is automatically paused - a voice can can read each word after the CW transmission, to allow mentally check the reception without even looking at the screen - international Text-to-speech can read the text after having been sent in CW - long (alpha, bravo, etc.) or short (A, B, C, ...) voice samples are available - a QSO generator generates random "standard" QSO using a database of 1116 first names and 544 cities related to the 31 most popular countries, with 560 real rig names, antenna types, WX and so on - can read text from a file or copied and pasted from any source - can transmit words or sentences randomly taken from a file (for example a list of proverbs or aphorisms) - callsign generator with optional prefix and suffix generation - exercise verification can be done by reading the screen, by typing the answers or by listening to a voice that dictates it - over 100 international characters supported, including cyrillic - full support of prosigns - exercises can be configured and saved for fast retrieval

Version history

2 versions are listed, going back to v2.0.36538. Since v2.0.43330.0 it requires Android 6.0+.

All 2 versions

Security & authenticity

Security rating: Trusted

Signing certificate

  • Signature matches the Google Play version Checked by the source store on Aug 7, 2026.
  • Certificate issued to “IZ2UUF” This is the certificate of the Google Play version.
  • Same certificate as the other version checked

Store checks and file details

  • Developer signature verified Aug 7, 2026
  • Validated against Google Play Aug 7, 2026
  • Signed byCN=Davide Achilli, OU=development, O=IZ2UUF, L=Cesano Boscone, ST=MI, C=IT
  • Signing certificate (SHA-1)BD:71:E5:0C:E2:23:B2:1F:14:B5:84:0A:6A:06:A9:8D:DB:D1:8C:4A
  • File MD53cdbaa704c3aac231d7f01d9623b8858
  • Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (1 other version compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (5)

IZ2UUF Morse Koch CW requests 5 permissions, 1 of them sensitive.

Required hardware & features

IZ2UUF Morse Koch CW APK: questions and answers

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is IZ2UUF Morse Koch CW free?

The APK is free to download, but the app offers in-app purchases through Google Play.

Is the IZ2UUF Morse Koch CW APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the other version checked. After downloading, check that the file's MD5 is 3cdbaa704c3aac231d7f01d9623b8858.

Tags

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