Side by side
Merkuro Calendar (formerly Kalendar) vs Tuta Calendar
Both stand on calendar apps. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxWindows
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.
Visit Merkuro Calendar (formerly Kalendar)
Free plan AndroidiPhoneLinux+3
Choose Tuta Calendar if you want a mobile calendar with sharing and plan allowances that scale from 1 to 500 GB of storage. Check that one-way sync works for your needs, and compare paid tiers if the Free plan's single calendar or storage allowance is too limited.
Visit Tuta CalendarThe facts
| Merkuro Calendar (formerly Kalendar) | Tuta Calendar | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Linux, Windows | Android, iPhone, Linux, Mac, Web, Windows |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 3 |
| Maker | Not published | Tuta Calendar |
| Website | apps.kde.org | tuta.com |
| On calendar apps | #85 of 198 | #5 of 198 |
Merkuro Calendar (formerly Kalendar): 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
Tuta Calendar: what it does well
- Mobile apps are available for iOS and Android.
- Supports shared calendars.
- Free plan includes 1 GB of storage, 1 calendar, and 3 labels.
- Revolutionary and Legend both include unlimited calendars.
- Legend includes 500 GB of storage and 10 custom domains.
What to know first
- Calendar sync is one-way.
- The Free plan is limited to 1 calendar and 3 labels.
Alternatives to Merkuro Calendar (formerly Kalendar) Alternatives to Tuta Calendar The whole list