A digital lab notebook with MQTT
About this app
LabLog is a digital laboratory notebook designed to replace traditional paper-based lab records. It allows you to record sensor readings, procedures, and observations in a structured and organized way. Each entry is automatically timestamped, ensuring accurate and tamper-proof records.
In addition to text and numeric values, LabLog enables the storage of images, which can be particularly useful for later analysis—something paper notebooks can’t provide. The app differentiates itself by associating each entry with specific data keys, making it easier to categorize, search, and filter entries based on the type of information stored.
LabLog is ideal for laboratories equipped with IoT sensors that automatically measure and send data to a server. The app can also send manual entries to the same server using the MQTT protocol, ensuring that human-recorded data is securely stored alongside automated sensor readings.
This approach improves both the transparency and reliability of laboratory data. For example, when using analog pH strips, a lab technician can manually input the pH reading into LabLog and send it to the server with other sensor data, ensuring a unified and secure record-keeping system.
Licensed under GPL-3.0-or-later, by jakobkreft.
What's New in v1.15
Imported from the F-Droid repository index.
- Bug fix
- - mqtt username and password entry
Version history
Aug 17, 2025 · 2.8 MB · Android API 29–35 · code 16
Imported from the F-Droid repository index.
- Bug fix
- - mqtt username and password entry
SHA-256 994ca5ff311f6caef80adfa325c60f0561524f44a324e96b1a5246e762a4dfc2
Jul 15, 2025 · 2.8 MB · Android API 29–35 · code 15
Imported from the F-Droid repository index.
- Bug fix
- - Recent entries (See all..) button opens search activity
SHA-256 6905b02589bccfea08e83b3d33b5933e3abd40581551dd8d21e56713a7dce3fe
Jul 11, 2025 · 2.8 MB · Android API 29–35 · code 14
Imported from the F-Droid repository index.
- New features:
- - Custom Timestamp formats
- - Jump to specific entry from recent flexbox in main
- - Save button and input fields UI improved
SHA-256 2763d3228e1f89f6157c873bf8d35b2fae2beca8e2e1dcfc5fbe1088817ad130
Will it run on your device?
60%
- Targets newer Android builds, so legacy devices may be excluded.
- 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 si.uni_lj.fe.lablog 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, 1.14 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall LabLog 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 LabLog, and a listing is removed when the evidence for it stops holding up.
Get LabLog
Every source we list for si.uni_lj.fe.lablog 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
994ca5ff311f6caef80adfa325c60f0561524f44a324e96b1a5246e762a4dfc2
Signing certificate
d131e4cec0bacd42dc3f66772b32395f0dee703345c8f684b0845e109dcf2175
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.
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