OmaCal

Free plan LinuxMac

What OmaCal is

OmaCal is a free native desktop calendar for Linux and macOS. It connects with Google Calendar, iCloud, and CalDAV servers using two-way synchronization, and supports multiple Google accounts, iCloud, and any CalDAV server with controls for displaying and fetching individual calendars. Calendar views include Day, Week, Month, Year, and Big Year, with list modes for Day, Week, and Month. You can create, edit, delete, and repeat events, and import or export .ics files. Subscriptions can use Google Calendar, iCloud, CalDAV, webcal, or .ics sources, while CardDAV address books can suggest guests. Tasks may come from iCloud, Nextcloud, or CalDAV, or remain local; Apple Reminders lists are not accessible. Desktop notifications, reminders, a tray icon, start-on-login, and agenda widgets support daily use. Data is cached locally, credentials use the operating system credential store, and the maker says there is no server component, account system, analytics, or telemetry.

Who it suits

OmaCal suits Linux and macOS users who want a desktop calendar connected to Google Calendar, iCloud, or CalDAV. It also fits people needing local storage, task support, and multiple calendar views.

What it does well

Two-way sync with Google Calendar, iCloud, and CalDAV
Multiple calendar views, including Big Year
Creates, edits, deletes, and repeats events
Local database storage and operating-system credential storage
Free plan with no listed subscription cost

What to know first

No Windows version yet
No mobile apps
Apple Reminders lists are not accessible
Weather-enabled use makes forecast requests

Plans

Plan	Billed and limits	Price
Free	Free and open source desktop calendar	Free

As extremelabs.io lists them, read 12 Oct 2026. The maker's own page has the final word.

Verdict

OmaCal combines broad calendar-service support with local desktop storage on Linux and macOS. Its lack of Windows and mobile apps may matter if you need those platforms.

Facts from OmaCal's own pages

Account support: Users can connect multiple Google accounts, iCloud, and any CalDAV server, with per-calendar display and fetch controls. · omacal.app, 12 Oct 2026
AI and CLI: Its command-line interface supports calendar and task reads and writes, and an included skill can be installed for Claude Code or other agent frameworks. · omacal.app, 12 Oct 2026
Calendar sync: two_way · extremelabs.io, 22 Sept 2026
Desktop features: The app includes desktop notifications, reminders, a tray icon, start-on-login, and an agenda widget for the Omarchy bar; macOS exposes the agenda from the menu bar. · omacal.app, 12 Oct 2026
Event management: It supports creating, editing, deleting, and recurring events, as well as importing and exporting .ics files. · omacal.app, 12 Oct 2026
Free plan: Yes · extremelabs.io, 22 Sept 2026
Integrations: It supports calendar data from Google Calendar, iCloud, CalDAV, webcal and .ics subscriptions, and CardDAV address books for guest suggestions. · omacal.app, 12 Oct 2026
Local storage: Calendar data is cached in a local database, credentials are stored in the operating system credential store, and the maker says OmaCal has no server component, account system, analytics, or telemetry. · extremelabs.io, 12 Oct 2026
Maker: OmaCal is made by Extreme Labs; the maker’s About page describes its work in networking solutions and does not state a founding year or headquarters. · extremelabs.io, 12 Oct 2026
Mobile apps: none · extremelabs.io, 22 Sept 2026
Notable platform limit: The support page says there is no Windows version yet. · omacal.app, 12 Oct 2026
Other network requests: The app checks GitHub releases daily and, when weather is enabled, requests forecasts from Open-Meteo using coordinates from Omarchy settings or an IP-based estimate via wttr.in. · extremelabs.io, 12 Oct 2026
Security: The privacy policy describes OAuth 2.0 with PKCE, a loopback redirect, operating-system credential storage, and TLS-encrypted communication with Google. · extremelabs.io, 12 Oct 2026
Support: Users can report bugs or request features through GitHub issues, or email [email protected] for questions and private matters. · omacal.app, 12 Oct 2026
Tasks: Tasks can come from iCloud, Nextcloud, or CalDAV, or be stored locally; Apple Reminders lists are not accessible. · omacal.app, 12 Oct 2026
Views: It offers Day, Week, Month, Year, and Big Year views, plus a list mode for Day, Week, and Month. · omacal.app, 12 Oct 2026
What it does: OmaCal is a native desktop calendar for Google Calendar, iCloud, and CalDAV servers. · omacal.app, 12 Oct 2026

Where OmaCal stands on Freedom251

Calendar apps#105 of 194