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 13 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 Fossify Calendar, Tuta Calendar, KashCal and fruux.

filter to find the best alternatives

Google Calendar alternatives are mainly Calendar Apps, but if you're looking for Todo List Managers or Team Collaboration Tools you can filter on that. Other popular filters include Open Source, Android + Open Source, Self-Hosted, EU, Android, iPhone and Free. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Google Calendar.
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Alternatives list

  1. Etar icon

    Etar

     88 likes

    Material design open source calendar for Android.

    64 Etar alternatives

    Cost / License

    Application type

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    Etar screenshot 1
     
    |
    5
    Etar vs Google Calendar Comments
    Top Positive Comment
    Guest
    6

    Nice, clean, and to the point calendar!

    Top Negative Comment
    paddling583
    4

    It has a terrible interface and the description lied about it being a material design. It also lacks export and sync.

    Guest
    Negative
    0

    does not conform to UNIX principles (let the application be one, but it will work well and cooperate with other functions and applications in the system); The interface is hideous. Nothing is anywhere, it's hard to figure out; It is not practical. Notion Calendar or Apple Calendar for example have a lot of common handy features that Etar doesn't have;

    3 of 5 comments
    • Etar is Free and Open SourceGoogle Calendar is Free Personal and Proprietary
    • Etar is Lightweight and Privacy focusedGoogle Calendar is not according to our users
  2. Fossify Calendar icon

    Fossify Calendar

     65 likes

    Your privacy-aware, open-source calendar with intuitive design and multi-platform syncing.

    66 Fossify Calendar alternatives

    Cost / License

    Application type

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    Fossify Calendar screenshot 1
     
    |
    2
    Fossify Calendar vs Google Calendar Comments
    amphetamachine
    Positive
    0

    Numerous outstanding bugs make Fossify Calendar not recommendable as a working alternative to Google Calendar. Some I've personally experienced: Often fails to display events in the calendar; Interprets event recurrence information incorrectly; Re-writes UIDs when importing, leading to duplicating events on re-import/update.

    Guest
    Positive
    0

    Customizable and you have control over your data.

    • Fossify Calendar is Free and Open SourceGoogle Calendar is Free Personal and Proprietary
    • Fossify Calendar is Privacy focused, Customizable and LightweightGoogle Calendar is not according to our users
  4. Tuta Calendar icon

    Tuta Calendar

     48 likes

    Tuta Calendar offers secure event organization with end-to-end encryption and no ads or tracking. Enjoy multi-device sync, multiple calendar views, and offline access. Fully compliant with strict German data protection laws. Manage recurring events, unlimited calendars, and seamlessly integrate with Tuta Mail.

    48 Tuta Calendar alternatives

    Cost / License

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    • Thunderbird
    • OpenAPK
    Tuta Calendar screenshot 1
     
    |
    1
    Tuta Calendar vs Google Calendar Comments
    JOPloume
    Positive
    0

    End-to-end encryption and works across all platforms: for me, on Android, Mac, and Windows (and even via Browser)!

    • Tuta Calendar is Freemium and Open SourceGoogle Calendar is Free Personal and Proprietary
    • Tuta Calendar is Privacy focused, Lightweight and CustomizableGoogle Calendar is not according to our users
  5. KashCal icon

    KashCal

     7 likes

    A privacy-first calendar that works offline and looks beautiful. Connect to iCloud — or don't. Your schedule, your choice.

    55 KashCal alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Android
    • F-Droid
    KashCal screenshot 1
     
  7. fruux icon

    fruux

     37 likes

    fruux is a free service that takes care of your contacts, calendars and more so you don't have to. Never manually copy contacts and calenders between your devices again!

    Cost / License

    • Freemium
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Blackberry
    • Windows Phone
    • iPad
    • Blackberry 10
    • Sailfish OS
    • Software as a Service (SaaS)
    fruux screenshot 1
     
  8. Right Calendar icon

    Right Calendar

     11 likes

    Right Calendar app is a versatile scheduling tool that offers unparalleled flexibility to its users. One of its standout features is that it is built on an open-source platform. This not only ensures transparency but also allows for constant updates and bug fixes from a...

    Cost / License

    Application types

    Platforms

    • Android
    Right Calendar screenshot 1
     
  9. Daymo icon

    Daymo

     3 likes

    Daymo is a free, open-source calendar for iOS and Android that makes upcoming days and weeks easier to overview at a glance.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Android
    • iPhone
    • iPad
    • Android Tablet
    Daymo screenshot 1
     
  10. Calendula icon

    Calendula

     2 likes

    A modern Material 3 Expressive calendar for Android. Reads, writes, and reminds — on top of the system calendar, with zero network access.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    • Obtainium
    Calendula screenshot 1
     
  11. Todo Agenda icon

    Todo Agenda

     2 likes

    Android home screen widgets showing future (and past) calendar events and tasks.

    Cost / License

    Platforms

    • Android
    • F-Droid
    Todo Agenda screenshot 1
     
  12. Persian Calendar icon

    Persian Calendar

     4 likes

    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.

    Cost / License

    Application type

    Platforms

    • Android
    Persian Calendar screenshot 1
     
  13. SilentSuite icon

    SilentSuite

     2 likes

    End-to-end encrypted sync for calendar, contacts and tasks. Integrates with your existing apps, data is encrypted on your devices before it ever reaches the server.

    12 SilentSuite alternatives

    Cost / License

    • Freemium
    • Open Source

    Application type

    Platforms

    • Online
    • Android
    • Windows
    • Mac
    • Software as a Service (SaaS)
    • Self-Hosted
    • Docker
    Mobile: Calendar, agenda, light
     
  14. J

    jquery-calendar

     1 like

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

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Self-Hosted
    jquery-calendar screenshot 1
     
12 of 13 Google Calendar alternatives