I already have Proton and Tuta account and I currently use Proton Calender. But, it's quite frustrating that I cannot even add things offline on my Android app.
I was looking to integrate my Calender into my Window Manager environment using waybar and I realized it's not possible with Proton Calender or with Tuta.
ProtonBridge still doesn't support
What the Documents Show
This is not a temporary synchronization delay or a feature roadmap item. The applications refuse to function offline by design. The second, equally significant limitation concerns integration with waybar, a status bar application commonly used in tiling window managers like i3, Hyprmnesia, and sway. Waybar provides real-time system information integration—network status, battery, time, and application notifications. A user seeking to display their encrypted calendar data within waybar's widget system discovered this integration is not possible with either Proton or Tutanota.
Follow the Money
The calendar data remains siloed within proprietary applications, inaccessible to the open-source desktop environment that the user operates. Proton Bridge, Proton's protocol bridge application designed to enable IMAP/SMTP access to Proton Mail, does not extend calendar protocol support. According to the source material, this development gap persists despite Proton Bridge's existence as a technical solution that could theoretically expose calendar data to standard-compliant applications via CalDAV or similar open protocols. The practical consequence is clear: users who require offline calendar functionality and desktop environment integration cannot use Proton Calendar or Tutanota Calendar without accepting significant operational friction. They must choose between encrypted calendar services and calendar systems that function according to their hardware and software constraints. This is not a choice between convenience and privacy—it is a choice between privacy and basic functionality.
What Else We Know
The user's inquiry reveals an unaddressed market gap. Privacy-focused calendar applications have optimized for threat models centered on server-side data interception and corporate data harvesting. They have not optimized for users operating in specific technical environments or users whose workflows depend on offline-first operations. This is a strategic decision by both Proton and Tutanota. Their roadmap prioritizes feature parity with Google Calendar's web interface and mobile synchronization. Linux desktop integration and offline-first workflows are not resources allocated to development teams.
Primary Sources
- Source: r/privacy
- Category: Tech & Privacy
- Cross-reference independently — don't take our word for it.
Disclosure: NewsAnarchist aggregates from public records, API feeds (Federal Register, CourtListener, MuckRock, Hacker News), and independent media. AI-assisted synthesis. Always verify primary sources linked above.