Minimalist app to track milk kefir, water kefir, and kombucha fermentation times
About this app
Kefir Control was born out of the need to remember when your fermentation is at its perfect point. Whether it's milk kefir, water kefir (fruit kefir), or kombucha, if left for too long, it becomes excessively acidic. This application simplifies that process with scheduled local notifications and a visual timer.
Core Features: - Multiple Ferments: Track milk kefir, water kefir, and kombucha simultaneously. - Quick Timers: Choose between preset durations or set your own custom time. - Past Fermentation Logging: If you forgot to start the timer, you can set the start time manually. - Local Notifications (Off-grid): The app schedules the alarm using your own device, working offline and without servers. - Full History: Keep a record of all your past harvests to maintain strict control. - Privacy First: No user accounts, no analytics, and no cross-site tracking. Data lives exclusively on your device.
Licensed under AGPL-3.0-only, by Raúl Morales.
What's New in v2.3.0
Imported from the F-Droid repository index.
Version history
May 12, 2026 · 21.1 MB · Android API 24–36 · code 93
Imported from the F-Droid repository index.
SHA-256 5605b2d5056a777b083b96b974057fb8b43cb7d080ee05206caee7f35e8ecc14
May 12, 2026 · 19.8 MB · Android API 24–36 · code 92
Imported from the F-Droid repository index.
SHA-256 03366c680b53609dd538e8febf8e35148c534fd67176843ebef0e86f15d08894
May 12, 2026 · 17.6 MB · Android API 24–36 · code 91
Imported from the F-Droid repository index.
SHA-256 c4c4c9b52f4cfa2c305eb9b7643e175bfe0d1e3ee9f19da08d780381b47939fb
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- 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 eu.raulmorales.kefircontrol 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, 2.3.0 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Kefir Control 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 Kefir Control, and a listing is removed when the evidence for it stops holding up.
Get Kefir Control
Every source we list for eu.raulmorales.kefircontrol 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
5605b2d5056a777b083b96b974057fb8b43cb7d080ee05206caee7f35e8ecc14
Signing certificate
53902eecd5bb565b7db2af71ea53bf5e42f0bbfd71f913639466223ade49554d
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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