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Open Source Google Calendar Alternatives for Android

There are many alternatives to Google Calendar for Android if you are looking for a replacement. The best open source Android alternative is Etar. If that doesn't suit you, our users have ranked more than 100 alternatives to Google Calendar and six of them are open source and available for Android so hopefully you can find a suitable replacement. Other interesting open source Android alternatives to Google Calendar are Simple Calendar, Proton Calendar, Woelkli and Persian Calendar.

Google Calendar alternatives are mainly Calendar Apps but may also be Email Clients or Todo List Managers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Google Calendar.
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  • FreeProprietary
  • Online
  • Android
  • iPhone
  • Chrome OS
  • Android Tablet
  • iPad
  • Sunbird
  • Google Chrome

With Google Calendar, its easy to keep track of all your lifes important events in one place. You can add events and send...

Learn more about Google Calendar

  1. Etar icon

    Etar

    • FreeOpen Source
    • Android
    • Android Tablet

    Material design open source calendar for Android.

    ⚫︎ LightweightEtar consumes less device resources compared to similar apps.
    ⚫︎ Privacy focusedEtar is considered a privacy friendly alternative.
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    Etar vs Google Calendar opinions
    Almost everyone thinks Etar is a great alternative to Google Calendar.
    3rd

    Import and export function is listed but it didnt work for me at all. Worse, on my latest phone I could not even import an ICS file with all my stuff.

    Negative comment ago
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    Open source and works well !!

    Positive comment ago
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    Nice, clean, and to the point calendar!

    Positive comment ago
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    7
  2. Simple Calendar icon

    Simple Calendar

    • FreemiumOpen Source
    • Android
    • Android Tablet
    • F-Droid

    A simple calendar with optional CalDAV synchronization. You can easily create recurring events and setup reminders, it can also display week numbers.

    ⚫︎ Dark ModeSimple Calendar supports dark mode for comfortable usage in low light conditions.
    ⚫︎ No TrackingSimple Calendar will not track or use your personal data.
    ⚫︎ Works OfflineSimple Calendar can be used without the need to connect to the internet.
    ⚫︎ CustomizableSimple Calendar is easy to customize with themes or similar features.
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    Simple Calendar vs Google Calendar opinions
    Almost everyone thinks Simple Calendar is a great alternative to Google Calendar.

    Open source, has widgets and is quite configurable

    Positive comment ago
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    1


  3. Proton Calendar icon

    Proton Calendar

    • FreemiumOpen Source
    • Online
    • Android
    • Android Tablet
    • Tor

    Your calendar is a record of your life. Proton Calendar helps keep it private.

    ⚫︎ Privacy focusedProton Calendar is considered a privacy friendly alternative.
    ⚫︎ End-to-End EncryptionProton Calendar has E2E Encryption, for entire or parts of the app.
    ⚫︎ Two-factor AuthenticationProton Calendar supports two-factor authentication (2FA).
    ⚫︎ Dark ModeProton Calendar supports dark mode for comfortable usage in low light conditions.
    ⚫︎ Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
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    Proton Calendar vs Google Calendar opinions
    pros, cons and recent comments
    Deivedux

    ProtonCalendar may not be as feature-rich as Google Calendar, but their main focus is protecting user data with end-to-end encryption. The free plan is enough for basic calendar functionality, but paid subscriptions give extra benefits for supporting their business model, as that's their only source of income.

    Positive comment ago
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    1
  4. Woelkli icon

    Woelkli

    • FreemiumOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad

    woelkli is a service that provides secure cloud storage hosted in Switzerland. Save, view, edit and share your files from anywhere in the world, from any device

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    Woelkli vs Google Calendar opinions
    This alternative is disputed. Woelkli is still a legitimate alternative to Google Calendar, but it might have issues that some users think are important.

    It's a cloud storage service...

    Negative comment ago
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    4
  5. Persian Calendar icon

    Persian Calendar

    • FreeOpen Source
    • Android

    Free and open-source Persian Calendar with Compass/Qibla and Athan, and Afghanistan holidays, Dari, Kurdish, Arabic and Pashto support. Supports Gregorian and Islamic calendars support also.

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  6. jquery-calendar

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Self-Hosted

    jquery-calendar - A responsive jquery calendar scheduler built with bootstrap and moment.js

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Showing 6 of 6 alternatives