MyBrain combines tasks, notes, calendars, diary entries, bookmarks, and an AI assistant.
Open source
24 alternativesEtar
Etar provides an open-source Android calendar with a material-designed interface.
About Etar
Etar is an open-source calendar for Android based on AOSP Calendar. It displays calendars available through Android calendar storage, with month, week, day and agenda views, support for phone-only offline calendars, dark and light themes, an agenda widget, ICS sharing and import/export from SD card, and a multilingual interface.
It does not include a CalDAV client, so syncing to a server requires a separate app such as DAVx5. Its ICS import feature is described as unstable with known bugs and should be used with caution.
Key features
- Month, week, day, and agenda views
- Shows calendars from Android calendar storage
- Supports phone-only offline calendars
- Dark and light themes
- Agenda widget
- Shares calendars via ICS and imports/exports from SD card
Best for: Android users who want an open-source calendar for local calendars and calendars synced through Android storage.
Good for
- Open-source code licensed under GPLv3
- Works with calendars provided by other Android apps and supports offline calendars
- Offers dark and light themes and a multilingual interface
Watch out for
- Does not include a CalDAV client; server sync needs a separate app such as DAVx5
- ICS import is unstable with known bugs and should be used with caution
- Rejecting optional contacts permission disables guest search and location suggestions
Etar at a glance
- Category
- Mobile Apps › Android Productivity Apps
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Android
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Etar alternatives
Tools and sites you could use instead, ranked by how closely they match.
Timeto.me organizes goals, checklists, tasks, recurring tasks, and time tracking in a single Android application.
Open source
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Taskito organizes tasks, reminders, routines, and calendar events in a timeline planner for Android, iOS, and the web.
TimeTree lets families, friends, or coworkers share calendars and coordinate plans in groups.
Birday helps users remember birthdays and events with an open source app that provides reminders without an account.
Notally helps Android users create and organize notes with a lightweight note-taking interface.
Open source
24 alternativesPopular in Android Productivity Apps
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Etar FAQ
Can I keep my calendar only on my phone?
Yes, create an offline calendar in Etar.
How do I sync Etar with a CalDAV server?
Use a separate sync app such as DAVx5, because Etar does not include a CalDAV client.
What permissions does Etar require?
It requires read and write calendar access for events; contacts access is optional for guest search and location suggestions.
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