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Calendar

Proton Calendar

Privacy-oriented calendar to reduce

and improve data control.

Privacy score 74 Free Technical: Beginner Featured
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Proton Calendar offers a privacy-conscious alternative in this category, with a stronger focus on data protection than many mainstream tools.

Web Android iOS

✓ Good for you if:

  • • You want fewer trackers and less account-linked data
  • • You care about privacy by default

Key qualities

✓ Encryption ✓ Low telemetry

Overview

This is a technical-level placeholder. You can extend it with concrete protocol details, implementation notes, audit information, and links to whitepapers once you write a full review.

Privacy highlight

More privacy-oriented than mainstream.

Quick facts

Country:
🇨🇭 Switzerland
Pricing:
Free
Platform:
Web, Android, iOS
Technical:
Beginner
:
Unknown
:
No
Open-source status:
Closed source
:
No
:
Yes

Key features

  • Events & reminders
  • Sharing (varies)
  • Import/export (ICS)
  • Multiple calendars
  • Sync across devices (varies)
Security & encryption Click to expand
Unknown
Encryption protocols
Encryption at rest (provider/self-host dependent), TLS in transit
Designed to protect core content with client-side ; details vary by feature and settings.
Offline support
No
Telemetry & tracking Click to expand
Not specified
No
Describe the pipeline here once you have confirmed the implementation.
Jurisdiction & compliance Click to expand
Fill with concrete hosting regions and data centers once verified.
Fill in concrete retention windows once you have verified them from primary sources.
Legal frameworks
List applicable frameworks once confirmed (e.g., GDPR, CCPA, LGPD).
Revenue sources
paid subscriptions
Editorial signals Click to expand
74
Trust score
62
Trust breakdown (0–10)
Encryption: 70, Audits: 50, Open source: 45, Telemetry: 80, Jurisdiction: 85, Transparency: 50, Trackers: 90
Editorial notes
Usability: 75, Performance: 80, Family friendly: 80
User experience Click to expand
Signup requirements
email
Onboarding difficulty (1-5)
3
Accessibility features
Add technical accessibility details after testing.
Backup & portability Click to expand
Yes
Migration tools
Describe CLI, export/import, and migration flows after review.
Explain key and account recovery models after research.

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