Alternatives to Etar
An open-source Material Design calendar app for Android. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Etar
An open-source Material Design calendar app for Android.
Replacements
Listings that take over the same core job as Etar.
Proton Calendar
An end-to-end encrypted calendar from Proton, available on the web and on iOS and Android.
Proton Calendar offers an end-to-end encrypted Android calendar with web and iOS apps, but it requires a Proton account and is not open source.
Notion Calendar
A free calendar app, formerly Cron, that works with Google Calendar and Notion workspaces.
Notion Calendar is a free proprietary calendar for Android and desktop built around Google Calendar and Notion, with scheduling links and time zone views.
Microsoft Outlook for iOS and Android
Microsoft's Outlook mobile app for email, calendar and contacts on iPhone, iPad and Android.
Microsoft Outlook for iOS and Android combines calendar with email and contacts, but it is closed source and closely tied to Microsoft's services.
Google Calendar
Google's free web calendar for scheduling events, used with a Google account and synced across devices.
Google Calendar is a free calendar synced across devices through a Google account, trading Etar's open source local approach for data stored on Google's servers.
Similar software
Related functionality, not a direct replacement.
DAVx⁵
An Android app that syncs contacts, calendars and tasks over CardDAV and CalDAV and accesses WebDAV files.
Tasks.org
An open-source Android to-do list and reminders app that syncs with CalDAV, Google Tasks and more.
Baïkal
A lightweight self-hosted CalDAV and CardDAV server for syncing your own calendars and contacts.
Radicale
A small self-hosted CalDAV and CardDAV server for keeping calendars and contacts on your own machine.
