Learn to receive morse code
About this app
Use the Koch method to learn morse code. Each session, the app will play random morse code characters, and score you based on how accurately you transcribe them. The first lesson starts with only two letters, with each new lesson adding an extra character.
Licensed under MIT.
What's New in v4.6
Imported from the F-Droid repository index.
- Fix crash on startup
Version history
May 31, 2023 · 1.5 MB · Android API 21–31 · code 46
Imported from the F-Droid repository index.
- Fix crash on startup
SHA-256 574e9563a1449f28e073513cc2148cc2cf25e415e8a66a8e59361c85e25689cf
May 23, 2023 · 1.5 MB · Android API 21–31 · code 45
Imported from the F-Droid repository index.
- Improved visual display of training results (Thanks, p-davide)
- App now runs on Android 5 (Thanks, p-davide, again)
- Add Italian translation (p-davide, again!)
- Fix bug where sounder would break when entering unknown characters
- Add additional characters specified by ITU morse code
SHA-256 1e7afd3c059e067451edecb082a69ec7f23afdaf52e878adc813265f28278191
Sep 4, 2022 · 1.5 MB · Android API 23–29 · code 44
Imported from the F-Droid repository index.
- Fixed bug where duration of lessons was too long
- Added tip if users didn't add spaces to lesson input
- Improved "Sounder" UI.
- Shows user the progress and upcoming text.
- Add an "auto-send" checkbox, allowing writing a message
- and sending all in one go.
SHA-256 6c8a45d2250bc2892aff4be83548f2ee0673c08a7b5c9f7e41b72f1d3b01929d
Will it run on your device?
73%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be es.eoinrul.ecwt is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 4.5 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Morse Trainer first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Morse Trainer, and a listing is removed when the evidence for it stops holding up.
Get Morse Trainer
Every source we list for es.eoinrul.ecwt is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
574e9563a1449f28e073513cc2148cc2cf25e415e8a66a8e59361c85e25689cf
Signing certificate
79cb8cc2bbfe26091d123af24a4ea88b23e0999bd532ed67b757aa9511b32ed1
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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