Merkuro Calendar (formerly Kalendar)
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What Merkuro Calendar (formerly Kalendar) is
Merkuro Calendar, formerly Kalendar, is free software for managing events and tasks on Linux and Windows. It works with local calendars and online sources including Nextcloud, Google Calendar, Outlook, and CalDAV. Event views cover the month, an hour-by-hour week, and an upcoming-event schedule. The task area supports tasks, subtasks, a tree structure, and customizable filters for narrowing related work. KDE says Merkuro was built for desktop, mobile, and devices in between. The application uses the GPL-3.0-or-later license and can generally be installed without charge. Linux installation is offered through Discover, other AppStream stores, or a distribution package manager; Windows is also listed. Nightly installers are available for testing, and KDE labels them unstable builds from the latest development branch. Help links include a KDE forum, Merkuro Matrix channel, and bug reporting. KDE’s software privacy policy says its software generally does not transfer device information unless a user explicitly acts, though third-party distributors may modify the software.
Who it suits
Merkuro Calendar suits users who want a free, open-source calendar and task application across Linux or Windows, with local and online calendar sources.
What it does well
- Supports Nextcloud, Google Calendar, Outlook, and CalDAV
- Month, week, and schedule event views
- Tasks include subtasks, tree view, and filters
- GPL-3.0-or-later licensed free software
- Linux and Windows availability
What to know first
- Nightly installers are labeled unstable
- Third-party distributors may alter privacy behavior
- No free trial is offered because it is free software
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Merkuro Calendar | Free software; local and online calendars | Free |
As apps.kde.org lists them, read 12 Oct 2026. The maker's own page has the final word.
Verdict
Merkuro Calendar combines multi-source calendars with structured task management in a free KDE application. Stable packages are available through listed Linux channels, while Windows nightly builds are intended for testing.
Facts from Merkuro Calendar (formerly Kalendar)'s own pages
- Calendar sources
- It supports local calendars and online calendars including Nextcloud, Google Calendar, Outlook, and CalDAV. · apps.kde.org, 12 Oct 2026
- Calendar views
- It offers month, week, and schedule views for events. · apps.kde.org, 5 Oct 2026
- Development builds
- Nightly installers are available for testing, and KDE identifies the unstable version as generated from the latest development branch. · apps.kde.org, 5 Oct 2026
- Device use
- KDE says Merkuro Calendar is designed for desktop, mobile, and devices in between. · apps.kde.org, 12 Oct 2026
- Downloads
- The page offers Linux installation through Discover or other AppStream stores, or through a distribution’s package manager, and lists Windows as another platform. · apps.kde.org, 5 Oct 2026
- Free plan
- Yes · apps.kde.org, 22 Sept 2026
- Free software
- KDE describes its software as Free Software that can generally be downloaded and installed free of charge. · kde.org, 12 Oct 2026
- Help and support
- The product page links to a KDE forum and a Merkuro Matrix channel for help. · apps.kde.org, 5 Oct 2026
- Latest listed release
- The page lists version 26.08.2, released October 8, 2026. · apps.kde.org, 12 Oct 2026
- License
- The application is listed under the GPL-3.0-or-later license. · apps.kde.org, 12 Oct 2026
- Linux installation
- The KDE page offers Linux installation through Discover and other AppStream stores, or a distribution package manager. · apps.kde.org, 12 Oct 2026
- Maker
- The product page identifies KDE as its maker; KDE e.V. represents the KDE Community in legal and financial matters as a registered non-profit organization. · ev.kde.org, 12 Oct 2026
- Organization
- KDE e.V. is a registered nonprofit that represents the KDE Community in legal and financial matters. · ev.kde.org, 5 Oct 2026
- Privacy
- KDE’s software privacy policy says its software generally does not transfer information from users’ devices except after an explicit user action. · kde.org, 5 Oct 2026
- Privacy scope
- KDE says third-party distributors may modify its software, potentially affecting whether it follows the KDE software privacy policy. · kde.org, 5 Oct 2026
- Purpose
- Merkuro Calendar is a calendar application for managing tasks and events. · apps.kde.org, 12 Oct 2026
- Support
- The product page links to a KDE forum, a Matrix room, and bug reporting. · apps.kde.org, 12 Oct 2026
- Task management
- Its task view supports tasks and subtasks with a tree view and customizable filtering. · apps.kde.org, 12 Oct 2026
- Views
- It includes month, hour-by-hour week, and upcoming-event schedule views. · apps.kde.org, 12 Oct 2026
- Windows availability
- The product page lists Windows as another platform and links to a Windows nightly installer for testing. · apps.kde.org, 12 Oct 2026
Where Merkuro Calendar (formerly Kalendar) stands on Freedom251
- Calendar apps#84 of 194