A precise and minimal timer for HEMA training and sparring.
About this app
GDF HEMA Timer is a precise and minimal timer designed for Historical European Martial Arts (HEMA) training. It helps fencers, instructors, and tournament organizers manage timing during drills, bouts, and sparring sessions.
Features: - Simple interface with large, readable display - Configurable round and break durations - Audible and vibration alerts for start and end signals - Preset saving for repeated training routines - Works fully offline, with no ads or tracking - Open-source and lightweight
This timer is developed by practitioners for practitioners, focusing on reliability and clarity during intense training sessions.
Licensed under GPL-3.0-only, by kstepanovdev.
What's New in v1.1.20
Imported from the F-Droid repository index.
Version history
Jul 16, 2026 · 16.9 MB · Android API 24–36 · code 11203
Imported from the F-Droid repository index.
SHA-256 39244f1bcde78c99bfa3ab9dce9730db0f38bdd017b347e1992bad220d30f6a1
Jul 16, 2026 · 14.4 MB · Android API 24–36 · code 11202
Imported from the F-Droid repository index.
SHA-256 e08e37f34da8ae0c33fe8adeded7bcabe645913d01f696cae37cf6c593285051
Jul 16, 2026 · 18.3 MB · Android API 24–36 · code 11201
Imported from the F-Droid repository index.
SHA-256 b004ff97888d1d6dfbaa6781afbf6ee3beeb447f13f813b2df9e37e83adcea28
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
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 com.gdf.hema_timer 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, 1.1.20 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall GDF HEMA Timer 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 GDF HEMA Timer, and a listing is removed when the evidence for it stops holding up.
Get GDF HEMA Timer
Every source we list for com.gdf.hema_timer 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
39244f1bcde78c99bfa3ab9dce9730db0f38bdd017b347e1992bad220d30f6a1
Signing certificate
497b0508a59463c797f9c40a7bae7b57d8be993a3ee68506d55de87f1565e5c8
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
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