Etar is described as 'Material design open source calendar for Android' and is a popular Calendar app in the office & productivity category. There are more than 25 alternatives to Etar for a variety of platforms, including Android, Web-based, iPhone, Android Tablet and iPad apps. The best Etar alternative is Tuta Mail, which is both free and Open Source. Other great apps like Etar are Google Calendar, Fossify Calendar, Proton Calendar and Tuta Calendar.
Versatile calendar offering day, week, month, and agenda views, color-coded event categories, Google Calendar integration, advanced task and event management, drag-and-drop rescheduling, templates, widgets, reminders, weather info, event sharing, and search features.
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