Compare Proton Calendar vs Fantastical

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Proton CalendarFantastical
 
Proton Calendar logoProton Calendar
Fantastical logoFantastical
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Main
Task management±±
Task lists±+
Recurring tasks+±
Subtasks−±
Subtasks recurring−±
Priorities±±
Habit tracking−−
Goals progress tracking−−
Analytics / reporting±±
Notes templates−±
Integrated templates±+
Calendar view++
Daily agenda view—+
Weekly view—+
Time blocking±+
Planner & calendar segregation−+
Offline mode±±
Reminders—+
AI scheduling—−
Smart rescheduling—−
Notes—±
Templates—−
Collaboration—±
Better for personal use++
Better for team use±±
Platforms
Windows±+
Android+−
Web+±
MacOS±+
iOS++
Desktop—+
Free version—±
Sync across devices++
Calendar sync
Calendar sync±+
Integrated calendar++
Synchronize with Apple Calendar±+
Synchronize with Google Calendar±+
Synchronize with Microsoft Calendar±+
Outlook sync±+
Interface
Themes / appearance presets++
Dark mode++
Notification support++
On-screen reminders++
Repeated reminders++
System / OS integration±+
Drag & drop±±
Special features
AI assistance / AI features−−
Attachments & embedded media±+
Stickers−±
Interactive checklists / checklist support−+
Handwriting & stylus
Apple Pencil support−−
Handwriting / stylus support−−
Palm rejection−−
PDF annotation / markup−−
Handwriting to text conversion−−
Search in handwriting−−
Special features
Meeting notes workflow±±
Time tracking−±
Pomodoro / focus−−
Binding task to geo±±
Projects / folders±±
Nested folders / depth±±
Tags & filters±+
Search±+
Synchronize & backup
Cloud sync++
Password-protected notes±−
iCloud / Google Drive sync−±
Auto backup+±
Notes / tasks sharing±±
Task sharing, delegation±±
Collaboration / sharing (incl. team)±±
Sharing events++
Export to PDF / other±±
Export via link±—
Slack / Zapier integrations−±
Google Workspace support±±
Profile
Calendars++

Proton Calendar

Pros

  • Event metadata is designed for zero-access encryption on Proton’s infrastructure
  • No ads or third-party trackers in the product’s privacy positioning
  • Same Proton Account ties calendar, mail, VPN, drive, and pass for one subscription story
  • Web plus iOS and Android clients cover typical mobile-and-browser workflows
  • Swiss jurisdiction and open-audit culture matter for security-sensitive teams

Cons

  • Feature depth and polish still trail Google Calendar for power schedulers
  • Store reviews cite sync latency, missing niceties, or occasional logout bugs
  • Deep Google Workspace or Microsoft org cal coexistence is not the primary design center
  • Native desktop clients are not the headline—browser access carries most laptop use
  • Meaningful calendar limits on the free tier push heavier users toward paid bundles

Fantastical

Pros

  • Natural-language event entry still sets the bar many competitors chase
  • Calendar sets and focus filters tame noisy multi-account weeks
  • Deep hooks for Exchange, Google, Zoom, Webex, and similar meeting stacks
  • Flexibits Scheduling cuts email ping-pong for external openings
  • Cross-device polish spans Mac, iOS, watchOS, visionOS, and Windows for subscribers

Cons

  • Premium power features sit behind Flexibits Premium rather than a single cheap unlock
  • No Android app in Flexibits’ own platform list—Android-first users look elsewhere
  • Team pricing and SSO land in mid-market territory versus free calendar defaults
  • Cardhop bundling matters less if you only wanted a calendar replacement
  • Windows parity arrived later; edge-case gaps still surface in forums