- Calendar views: display your calendar by Month, Week, Day, or List, and customize the appearance including calendar colors, weather, moons, birthdays, anniversaries, event times, week numbers, and more.
- Calendar sets: manage different, named collections of calendars, quickly switch between different Calendar Sets, assign different default calendars to different sets, and create new sets based on existing collections.
- Widgets: choose from a wide range of widgets (iOS 14+) such as Upcoming, Event List & Calendar, Calendar & Heatmap, Today's Date, Next two days, This week, Next two weeks, and more.
- Events: create events manually or automatically using natural language, choose from a wide range of attributes to display when viewing or editing events including travel time, time zones, attendees, contacts, tags, maps, last edit time, and more, and add tags to events to track projects and important events.
- Tasks: display tasks directly in the calendar and carry-forward until completed, schedule tasks to occur on a specific date or time, schedule tasks to repeat daily, weekly, monthly, etc., and sort and filter tasks by date, priority, calendar, or title.
- Travel time, locations & maps: supports Location Services for adding locations to events, supports both Apple Maps and Google Maps for driving directions, allows you to block out time to travel to an appointment, and warns you in advance of travel time when it's time to leave.
- Personalization: display Birthdays and Anniversaries, including birthday age and anniversary number, display a live 10-day weather forecast, display phases of the moon, and display graphics created in BusyCal for macOS.
- Sync & share calendars: sync and share calendars with iCloud, Google Calendar, Exchange, Office 365, Fruux, Yahoo, Kerio, Zimbra, Oracle, OwnCloud, Confluence, macOS Server, SabreDAV, and other CalDAV servers, and sync with other Mac and iOS devices running BusyCal or the built-in Calendar app.
- Dark Mode: switch to Dark Mode for a different look and feel.
- Inbox notifications: receive Inbox notifications of meetings and changes to events on shared calendars.
- Search: search your calendar for past and future events and tasks.
- Default settings: set default settings for events, tasks, and alarms.