BusyCal vs Readdle Calendars
Readdle Calendars and BusyCal are both native Mac and iOS calendars with multi-provider sync, built-in tasks, and a one-time purchase. Readdle Calendars is the lighter, cleaner app, with a drag-and-drop planner for scheduling tasks into time slots; BusyCal is the more configurable one, with Calendar Sets, nested Smart Filters, offline On My Mac calendars, and far more control over views.
Last reviewed: April 28, 2026.
Feature Snapshot
| Capability | BusyCal | Readdle 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 vs stacked layout 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 events as Free/Busy only (privacy print) | ✓ | |
| 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 combining calendars + rules + view/time-zone context | ✓ | |
| 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) |
Where Readdle Calendars May Be Better
- You want a clean, approachable calendar without heavy configuration.
- You prefer the drag-and-drop Planner for scheduling tasks into time slots visually.
- 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 a smart date picker that suggests dates as you type directly in the 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 context menu event alignment — Match Start/End, Create Between, 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 customizable view spans — 2 to 90 days in Week, 1 to 12 weeks in Month. 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 — 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 day/time window. 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, an official Claude Desktop / MCP integration, or a Raycast extension. Readdle Calendars has no scripting or external automation surface; AI in Readdle's lineup lives mainly inside Spark (their email app), not Calendars itself. Learn more.
Common Questions
- How is BusyCal priced next to Readdle Calendars?
- 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.
Official Links
Want to compare a few more options before deciding? Browse all BusyCal comparison guides.