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BusyCal vs Readdle Calendars

Readdle Calendars and BusyCal are native Mac and iOS calendars with support for several calendar services, built-in tasks, and a one-time purchase option. Readdle Calendars has a simpler interface and a drag-and-drop planner for scheduling tasks into time slots. BusyCal offers more ways to customize views, with Calendar Sets, nested Smart Filters, and offline On My Mac calendars.

Last reviewed: October 16, 2026.

Feature Snapshot​

CapabilityBusyCalReaddle Calendars
Native macOS + iOS app✓✓
Multi-provider sync (iCloud + Google + Exchange + CalDAV)✓✓ (iCloud + Google + Outlook + CalDAV)
On My Mac offline calendars✓
Calendar Sets✓
Calendar Groups✓
Nested Smart Filters (ALL/ANY/NONE)✓
Natural language Quick Entry✓✓
Smart Date Picker with real-time suggestions✓(title bar parsing only)
Configurable default alarms (per event type, per task type)✓Limited
Auto travel time when location is set✓
Default event duration & default start time✓✓
Floating Time Zone for new events/tasks✓
Default task priority & regeneration style✓
Working Hours toggle (collapse non-work hours)✓
Sunrise & sunset shading in Day/Week views✓
Side-by-side or stacked layouts for overlapping events✓
Context menu event alignment (Match Start/End, Create Between)✓
Multiple time zones in time ruler (up to 3)✓
Customizable view spans (2–90 days in week, 1–12 weeks in month)✓
Weather forecasts & moon phases✓✓ (weather)
Travel time with live traffic updates✓
Tags with auto-coloring and automatic tagging rules✓
Free/Busy availability viewer✓✓
Meeting Rooms picker with live availability (Google Workspace + Microsoft 365)✓✓
Drag-and-drop task planner✓
Quick Scheduler with event shortcuts/templates✓
Journal entry type✓
Sticky notes attached to dates✓
Event/date graphics and icons✓
Customizable Info Panel✓
Alarm Window with flexible snooze (keyboard-driven)✓
Holiday event display styles (footer, graphics)✓
Year Planner + Overview✓✓ (Year View)
Year metrics (Top Tags, Avg Scheduled / Workday, Meetings overview)✓
Spreadsheet List View with custom columns✓
Task list printing✓
Print only Free/Busy information to keep event details private✓
Task sorting, filtering, and grouping by calendar✓
Cross-calendar time blocking (manual)✓Manual duplicate only
Automatic time blocking with per-calendar rules (iCloud-synced)✓
Travel time built into time-blocking events✓
Conference call integration (Zoom, Teams)✓✓ (Zoom, Meet, GoToMeeting)
Live countdown to next event in menu bar✓
Automatic local backups✓
CSV export✓
Private LAN sync✓
Custom fonts for views, notes, and titles✓
Presets that save calendars, rules, view settings, and time zones together✓
Apple Watch app✓✓
Widgets (multiple sizes)✓✓
AppleScript automation✓ (full read/write)
Claude Desktop / MCP integration✓
Native AI scheduling assistant (built-in)(uses Claude Desktop via MCP)Limited (natural-language event parsing in Calendars; broader AI Assistant lives in Readdle's Spark email app)
Raycast extension✓
Siri integration✓✓
One-time purchase (perpetual license)✓✓ ($29.99 lifetime or $19.99/yr)

Booking Meetings with BusyCal​

Share a link for a consultation or call, and let the other person choose an available time. BusyCal Bookings checks busy times from your chosen calendars and adds confirmed meetings to the calendar you choose. You can set hours, leave breaks between meetings, ask questions, and approve each request if you prefer. Learn More.

Bookings is currently available only in BusyCal for Mac. Once you activate it on your Mac, the iPhone app automatically syncs free/busy times if both devices use the same iCloud account. Access depends on your Mac license’s update coverage, an active Mac App Store subscription or Setapp membership, or the free trial. See the access requirements.

Where Readdle Calendars May Be Better​

  • You prefer a calendar with fewer settings to configure.
  • You want to drag tasks into time slots in the Planner.
  • You want Quick Scheduler shortcuts and event templates for recurring routines.
  • You want an Apple Watch app with calendar faces.
  • You want home screen and desktop widgets in multiple sizes.
  • You prefer a lower-cost option ($19.99/yr or $29.99 lifetime).
  • You want Siri integration for hands-free event creation.
  • You value a polished, consistent experience across Mac, iPhone, iPad, and Apple Watch.

Where BusyCal May Be Better​

  • You want date suggestions as you type directly in a date field. Readdle parses natural language only in the title bar. Learn more.
  • You want a one-click Working Hours toggle to collapse non-work hours. Learn more.
  • You want sunrise & sunset shading in Day and Week views. Learn more.
  • You want to align events using the context menu commands Match Start/End, Create Between, and Create After. Learn more.
  • You want configurable defaults for alarms, travel time, duration, priority, and floating time zones. Learn more.
  • You want auto travel time added whenever a location is set. Learn more.
  • You want traffic-aware Time to Leave alarms that update in real time. Learn more.
  • You need nested Smart Filters with ALL/ANY/NONE conditions. Learn more.
  • You want Calendar Sets, content conditions, and view preferences saved together. Learn more.
  • You want to show 2 to 90 days in Week view or 1 to 12 weeks in Month view. Learn more.
  • You want multiple time zones displayed simultaneously in the time ruler. Learn more.
  • You want tags with auto-coloring and automatic tagging rules. Learn more.
  • You want moon phases alongside weather forecasts. Learn more.
  • You want a customizable Info Panel showing only the fields you use. Learn more.
  • You want a keyboard-driven Alarm Window with flexible snooze controls. Learn more.
  • You want a Year Planner for long-range scheduling. Learn more.
  • You want a spreadsheet-style List View with configurable columns. Learn more.
  • You want cross-calendar time blocking, with both manual blocks that stay synced to the original event and automatic time-blocking rules that mirror events from one calendar onto another (even across different accounts) based on your working schedule or a custom range of days and times. Rules sync across all your Macs and iPhones via iCloud. Learn more.
  • You want a menu bar countdown for upcoming and ongoing events. Learn more.
  • You want On My Mac offline calendars. Learn more.
  • You want automatic local backups and CSV export. Learn more.
  • You want AppleScript automation, the official Claude Desktop / MCP integration, or a Raycast extension. Readdle Calendars does not offer these integrations. Readdle’s broader AI assistant is part of Spark, its email app. Learn more.

Common Questions

How do BusyCal and Readdle Calendars compare on price?
Both offer a one-time purchase. BusyCal for Mac is $49.99 from our store with a free 14-day trial, and BusyCal for iPhone and iPad is $9.99 on the App Store. Readdle Calendars is $29.99 for a lifetime license or $19.99 a year.
Do both apps run on Mac, iPhone, and Apple Watch?
Yes. Both are native Mac and iOS apps with Apple Watch apps, widgets, and multi-provider calendar sync, and both include task management.
Which calendar accounts does each app sync?
BusyCal syncs iCloud, Google, Microsoft 365 and Exchange, and CalDAV accounts, and adds offline On My Mac calendars. Readdle Calendars syncs iCloud, Google, Outlook, and CalDAV accounts.
What does BusyCal add over Readdle Calendars?
Calendar Sets and Calendar Groups, nested Smart Filters, a Smart Date Picker that suggests dates as you type, customizable view spans, a spreadsheet-style List View, and automatic local backups.

Want to compare a few more options before deciding? Browse all BusyCal comparison guides.