How to Build Your Own Fantastical
Replace Fantastical with a custom build. The calendar and tasks app you won't be able to live without
Build Difficulty: 5/5
Build a working replacement in a weekend with AI tools
Estimated Timeline
Based on 44 features at Weekend Project difficulty, expect about One weekend with AI-assisted development.
Recommended Tech Stack
Full-stack React framework with API routes and server components
PostgreSQL database, auth, and real-time subscriptions
Utility-first styling for rapid UI development
Type-safe ORM for complex relational data models
Key Features to Replicate
Top features across 8 categories. See all 44 features
Integrations(5 features)
Works with Google, Microsoft 365, Exchange, iCloud, CalDAV, and more
Support for viewing and managing Google Tasks alongside calendar events
Support for viewing and managing iCloud Reminders alongside calendar events
Show map previews of event locations and open in Apple Maps, Google Maps, Waze, or other navigation apps
Integrate with Todoist to see tasks and calendar events together
Scheduling(4 features)
Send event proposals with multiple time options to invitees for selection
Set up available times and share a link for others to select meeting slots automatically blocking existing events
Combine availability of multiple team members to find times that work for everyone
Invite others to events with control over response types, participant numbers, and registration deadlines
Calendar Management(3 features)
Clear time zone handling with visible converted times in event details
Block out travel time to events to show when user will be in transit
Consolidate all calendars (work, personal, family) into a single organized view
Notifications(3 features)
Receive notifications for upcoming events and tasks
Track next event on lock screen and Dynamic Island showing time remaining, title, and location
Notifications when to leave for events considering traffic and weather conditions with AccuWeather MinuteCast
Productivity(3 features)
Quickly toggle multiple calendars on/off and automatically switch based on location or time
Create quick templates from existing events and tasks for frequent scheduling
Filter events and tasks to show only what matters with Calendar Sets and Focus Filters
Syncing(3 features)
Sync calendar sets across all devices including Apple Watch
Real-time syncing of events and tasks across Mac, iPhone, iPad, Apple Watch, Windows, and Apple Vision Pro
Real-time push synchronization of events and tasks across devices
Widgets(3 features)
14 customizable widgets for home screen showing events, tasks, calls, and weather
Display widgets on locked iPhone turned sideways while connected to power
Glance at events directly on iPhone lock screen with Up Next, Calendar, and Quick Action options
Conference Calls(2 features)
Automatically add Google Meet, Zoom, Microsoft Teams, or Webex calls to events created through Openings
Automatically detect and add links for 30+ conference call services including Zoom, Teams, Google Meet, Webex
Cost Calculator
Pricing data not available for Fantastical. Check their website for current pricing.