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One Calendar alternatives · Calendar

One Calendar alternatives with a Linux app

The One Calendar listing does not include a Linux app. 8 of the 75 other calendar and scheduling apps in this directory list a Linux app.

One Calendar has a free plan. Paid plans start at $5.99 one-time per platform (App Store or Google Play). 7 of them are free or have a free plan.

8 tools · Listings checked up to Oct 9, 2026 · Where the facts come from

How each one differs from One Calendar

  1. CalenGoo

    Highly configurable calendar and task app sold as a one-time purchase

    • CalenGoo starts at $5.99 one-time for Android; $6.99 for iOS; $49.99 for the desktop app. One Calendar starts at $5.99 one-time per platform (App Store or Google Play).
    • One Calendar has a free plan. CalenGoo does not, though it has a free trial.
    • Only CalenGoo lists a Linux app.
    • CalenGoo also covers templates, tasks and natural-language input.
    CalenGoo vs One CalendarCalenGoo pricing and details

  2. Rainlendar

    Skinnable desktop calendar for Windows, Mac and Linux

    • Rainlendar starts at €9.95 one-time for a lifetime Rainlendar Pro license. One Calendar starts at $5.99 one-time per platform (App Store or Google Play).
    • Only Rainlendar lists a Linux app.
    • Only One Calendar lists Android and iOS apps.
    • Rainlendar also covers tasks.
    Rainlendar vs One CalendarRainlendar pricing and details

  3. GNOME Calendar

    Free, open-source calendar app for the GNOME desktop on Linux

    • GNOME Calendar is free. One Calendar starts at $5.99 one-time per platform (App Store or Google Play).
    • Only GNOME Calendar lists a Linux app.
    • Only One Calendar lists Android, iOS, macOS and Windows apps.
    • GNOME Calendar is open source, according to its own site.
    GNOME Calendar pricing and details

  4. Proton Calendar

    End-to-end encrypted calendar from the maker of Proton Mail

    • Proton Calendar starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly. One Calendar starts at $5.99 one-time per platform (App Store or Google Play).
    • Only Proton Calendar lists a web app.
    • Only Proton Calendar lists a Linux app.
    • Proton Calendar is open source and end-to-end encrypted, according to its own site.
    Proton Calendar pricing and details

  5. Tuta Calendar

    End-to-end encrypted calendar bundled with Tuta Mail

    • Tuta Calendar starts at €3 per month, paid yearly (€3.60 paid monthly). One Calendar starts at $5.99 one-time per platform (App Store or Google Play).
    • Only Tuta Calendar lists a web app.
    • Only Tuta Calendar lists a Linux app.
    • Tuta Calendar is open source and end-to-end encrypted, according to its own site.
    Tuta Calendar pricing and details

  6. Toki

    AI calendar assistant that turns messages into events and to-dos

    • Toki starts at $3.99 per month, or $35.99 per year. One Calendar starts at $5.99 one-time per platform (App Store or Google Play).
    • Only Toki lists a web app.
    • Only Toki lists a Linux app.
    • One Calendar can be bought with a one-time purchase.
    Toki pricing and details

  7. Merkuro Calendar

    Open-source calendar and task app from KDE for Linux

    • Merkuro Calendar is free. One Calendar starts at $5.99 one-time per platform (App Store or Google Play).
    • Only Merkuro Calendar lists a Linux app.
    • Only One Calendar lists Android, iOS, macOS and Windows apps.
    • Merkuro Calendar is open source, according to its own site.
    Merkuro Calendar pricing and details

  8. Cal.com

    Scheduling platform with a free plan, API and embeds

    • Cal.com starts at $12 per user / month, billed yearly ($16 billed monthly). One Calendar starts at $5.99 one-time per platform (App Store or Google Play).
    • Only Cal.com lists a web app.
    • Only Cal.com lists a Linux app.
    • Only Cal.com lists a browser extension.
    Cal.com pricing and details

Common questions

Which One Calendar alternatives have a Linux app?

CalenGoo, Rainlendar, GNOME Calendar, Proton Calendar, Tuta Calendar, Toki, Merkuro Calendar and Cal.com list a Linux app.

Does One Calendar have a Linux app?

The One Calendar listing does not include a Linux app. It lists macOS, Windows, iOS and Android.

Which of these calendar and scheduling apps are free?

Rainlendar, GNOME Calendar, Proton Calendar, Tuta Calendar, Toki, Merkuro Calendar and Cal.com are free or have a free plan.

When was this checked?

Each listing shows its own date. On this page they run from Oct 4, 2026 to Oct 9, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to One Calendar: the alternatives its listing names first, then the tools that share the most features with it.