Etar Calendar – Simple, Modern & Open-Source Calendar for Android

If you want a clean, reliable, and privacy-respecting calendar app, Etar Calendar is one of the best open-source options available. It provides a beautiful Material Design interface, smooth performance, and all essential scheduling tools — without ads, trackers, or unnecessary permissions.

Built on the AOSP Calendar base and enhanced by the open-source community, Etar offers intuitive event management, multiple view modes, reminders, color coding, and seamless sync with CalDAV, Google Calendar, Nextcloud, and other services. Whether you’re planning your week, organizing tasks, or managing work schedules, Etar gives you a lightweight and dependable experience.

Perfect for users who want a minimal, distraction-free calendar app that “just works.”

Key Features

• Clean, Material Design user interface
• Day, Week, Month & Agenda views
• Create, edit & delete events effortlessly
• CalDAV sync compatible with Google, Nextcloud, DAVx⁵ & more
• Customizable colors for calendars and events
• Multiple reminders & all-day event support
• Dark mode for comfortable night viewing
• Search tool for finding events instantly
• Lightweight, open-source & 100% ad-free
• Works offline and syncs when connected

Why Users Love Etar Calendar

• Beautiful, simple UI that feels native to Android
• Great alternative to stock and commercial calendar apps
• Smooth syncing with popular cloud services
• Perfect for users who value privacy and open-source software
• Reliable performance with no clutter or distractions

Privacy & Security

Etar Calendar does not track your activity or collect personal data.
Your events remain private and under your control — synced only with the services you choose.

Because it’s open-source, everything about its functionality is transparent and trustworthy.