Keep track of journals, notes & tasks - iCalendar compliant and syncable with yo
About this app
Elevate the power of the iCalendar standard to the next level, use the potential of the combination of journals (VJournal), notes (VJournal) and tasks (VTodo) out of one app and use DAVx5 to synchronize your entries with a CalDAV-server of your choice!
iCal standard compliant Using the iCal standard ensures compatibility and interoparability with other apps and services independent of a dedicated provider or infrastructure. Journals and Notes are compliant to the definition of the VJOURNAL component, Tasks are compliant to the VTODO component. Future features will also include import and export functionalities to and from .ics files :-)
Combine journals, notes & tasks Instead of using separate apps for journals, notes & tasks you can use them out of one hand, combine and link them to each other, e.g. create meeting minutes and link your tasks to them.
Sync with DAVx5 Synchronize your entries with any compatible CalDAV server by using DAVx5. By using DAVx5 you are free to choose your preferred provider for CalDAV, you can even use your local server to store and synchronize your data. Note: DAVx5 is an independent app and must be acquired separately.
Open Source Your data can contain private and sensitive data by their nature. We believe that individuals and companies should be able to be in full control of their own data. This means the freedom to choose where and how the data are stored, and freedom in choice of software. That is why we chose DAVx5 as a Sync Adapter to synchronise your data between your phone and any compatible CalDAV-server. The source code for jtx Board is publically available - find out more on https://jtx.techbee.at !
What does VJournal and VTodo mean? VJournal and VTodo are calendar components defined in the international standard RFC-5545, the Internet Calendaring and Scheduling Core Object Specification (iCalendar), see https://datatracker.ietf.org/doc/html/rfc5545 . This standard also defines the VEvent component, which is the standard definition for calendar event entries. jtx Board is using the VJournal component according to this iCalendar standard for journal entries and tasks. VJournals can have a defined start date, but they cannot have a duration or an end date. VJournals with a defined start date are considered journals entries in jtx Board, VJournals without start date are interpreted as notes. The VTodo component as defined in the iCalendar standard defines the technical specification of tasks, which can have a scheduled start, due and completed date as well as a progress and a completed status (amongst others).
The VEvent definition is widely used, the VTodo component also found some implementations in Apps, but the VJournal component remained in the dark almost not being implemented at all by other apps and services. With jtx Board we would like to revive the usage of this standard and empower it with the possibilities to link and combine VTodos with VJournals - and in the future also VEvents! :-)
Find out more on https://jtx.techbee.at
Licensed under GPL-3.0-only, by Techbee e.U..
What's New in v2.16.02.ose
Imported from the F-Droid repository index.
- - Fixed issue with instant notification when creating a new task
- - Updates in widget
- - Version updates
Version history
Jun 27, 2026 · 8.5 MB · Android API 24–36 · code 216020007
Imported from the F-Droid repository index.
- - Fixed issue with instant notification when creating a new task
- - Updates in widget
- - Version updates
SHA-256 d71af562243ed4936caefa1b692639e3a6278db0be4fa452727f624b61929b88
May 21, 2026 · 10 MB · Android API 24–36 · code 216000015
Imported from the F-Droid repository index.
- - Markdown support for checkboxes
- - Fixed wrong sorting for categories
- - Version updates
SHA-256 e3bff0d9b8640f5e52056a4c71d565c5019be99c2bb90f3c283ac8584ba39b81
Dec 22, 2025 · 12.4 MB · Android API 23–36 · code 215000004
Imported from the F-Droid repository index.
- - New Markdown renderer
- - Version updates
- - Bugfixes
SHA-256 2e78b86aebb4ac41f254eecc3711b3c536890062900f67a423ab3a4aa9510de6
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
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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 at.techbee.jtx 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, 2.16.00.ose is the last build before it. Android will not install an older version code over a newer one, so you must uninstall jtx Board journals|notes|tasks 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.
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F-Droid listing
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Source code
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App Information
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SHA-256 Hash
d71af562243ed4936caefa1b692639e3a6278db0be4fa452727f624b61929b88
Signing certificate
25a16edc3cea5e27a32ecde1469ecf716c8d59e96b5130f675500cee02a0a45d
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