Killendar
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | Windows calendar · Optional password encryption · No account or subscription · GPLv3 open-source software | Free |
| Killendar | Windows 10/11 x64 · GPLv3 · no account or subscription | Free |
As killendar.net lists them, read 22 Sept 2026. The maker's own page has the final word.
Facts from Killendar's own pages
- AI integration
- KillerMCP can read the active calendar and create single appointments through the running Killendar app. · killendar.net, 12 Oct 2026
- Calendar files
- Each calendar is a .kcal SQLite file that users can read and back up with ordinary SQLite tools. · killendar.net, 12 Oct 2026
- Calendar sync
- none · killendar.net, 22 Sept 2026
- Calendar views
- It provides month, week, day, and agenda views, with overlapping appointments displayed side by side. · killendar.net, 12 Oct 2026
- Categories
- Users can define color categories, and an appointment can have several categories. · killendar.net, 12 Oct 2026
- Encryption
- Optional SQLCipher encryption protects the calendar file at rest with AES-256 and per-page HMAC-SHA512; without a password, the file remains plain SQLite. · killendar.net, 12 Oct 2026
- Free plan
- Yes · killendar.net, 22 Sept 2026
- Import and export
- Killendar imports and exports iCalendar files using RFC 5545. · killendar.net, 12 Oct 2026
- Installation
- The app can run portably or install per-user or for all users, and provides silent installation for winget, Chocolatey, and RMM deployment. · killendar.net, 12 Oct 2026
- Integration limits
- KillerMCP agenda requests cover at most 31 days and return at most 100 events; creating appointments requires Killendar to be open and unlocked. · killendar.net, 12 Oct 2026
- Mobile apps
- none · killendar.net, 22 Sept 2026
- Password recovery
- There is no password recovery for an encrypted calendar; if its password is lost, the app keeps the locked file on disk and opens a new empty calendar. · killendar.net, 12 Oct 2026
- Platform requirement
- The stated platform is Windows 10 or 11, x64, with .NET Framework 4.8. · killendar.net, 12 Oct 2026
- Purpose
- Killendar is a calendar app for Windows that works without an account, sync service, or telemetry. · killendar.net, 12 Oct 2026
- Scheduling links
- No · killendar.net, 22 Sept 2026
- Shared calendars
- No · killendar.net, 22 Sept 2026
- Support and feedback
- The maker directs users to GitHub issues for bug reports and suggestions. · killendar.net, 12 Oct 2026
Where Killendar stands on Freedom251
- Calendar apps#160 of 194