Prepare for the German HAM radio license exam
About this app
With this app, you can prepare for the amateur radio exam for classes N, E, and A. Practice all questions from the official question catalogs of the Federal Network Agency for the parts "Technology Class N", "Technology Class E", "Technology Class A", "Operating Technology", and "Regulations" and keep track of your progress. Use the option to simulate an exam and prepare for the real exam. The app is free, can be used offline, and contains no ads.
Licensed under GPL-3.0-only, by Michael Specht.
What's New in v0.4.4
Imported from the F-Droid repository index.
Version history
Jun 27, 2025 · 111.6 MB · Android API 28–34 · code 37
Imported from the F-Droid repository index.
SHA-256 8f6565212f31ba0b2c5a4caa47854c3e718f1f4c879d75dc8944faf3e4c48eda
May 11, 2025 · 93.9 MB · Android API 28–34 · code 32
Imported from the F-Droid repository index.
SHA-256 939586e5c19bec45e2cb47a4ea8f71b94f279ff537026dbc7d9f3c15538b4c9f
Nov 14, 2023 · 23.6 MB · Android API 19–33 · code 14
Imported from the F-Droid repository index.
- - fixed a bug with question TC507 (images not showing in answers)
SHA-256 9c183164b6aa0f1b5dcc4e97612911bfe0d95d1316452921b8ff553dc94bd45b
Will it run on your device?
69%
- Targets newer Android builds, so legacy devices may be excluded.
- Multiple CPU architectures are covered.
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 org.nhcham.hamfisted 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, 0.3.5 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Hamfisted 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 Hamfisted, and a listing is removed when the evidence for it stops holding up.
Get Hamfisted
Every source we list for org.nhcham.hamfisted 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
8f6565212f31ba0b2c5a4caa47854c3e718f1f4c879d75dc8944faf3e4c48eda
Signing certificate
4fd4ed6dd0d616be6e2a2caedc38387183b3f60c30ee28395f2363b0cff1bcaf
Permissions Required
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.
Report a problem with this listing
A listing is only as good as its corrections. If a source is broken, a signature looks wrong, or this app should not be here, tell the moderation team.