Overview · Full Intel report in progress

Tuta: Secure Private Calendar is an established productivity app that is completely free. With a 4.5/5 rating from 1K reviews, it shows polarized user reception.

What is Tuta: Secure Private Calendar?

Tuta Calendar is a privacy-focused productivity tool that provides end-to-end, quantum-safe encryption for scheduling and event management. It is designed for users who prioritize data security and zero-knowledge architecture, offering seamless integration with the Tuta Mail app.

Current Momentum

v340.260326 · 3w ago

Intense

Last updated 21d ago. 5 versions tracked.

Competition

Rivals identification in progress

7-Day Rank Pulse 🇺🇸

Productivity

No ranking data

Rating Pulse 🇺🇸

What makes this app unique?

What Are The Key Features?

Quantum-Safe EncryptionStandard

Ensures all event details and reminders are end-to-end encrypted and accessible only by the user.

Zero-Knowledge ArchitectureStandard

Maintains user privacy by ensuring the developer cannot access event times, meeting details, or attendee information.

Secure Event SharingStandard

Allows users to share events with others or external calendars via password-protected invites.

Tuta Mail IntegrationStandard

Provides a unified experience by connecting the calendar directly with the Tuta Mail application.

How much does it cost?

Free

Who Built It?

Tutao GmbH app icon

Tutao

(16.7K)

Providing privacy-focused email and calendar services with end-to-end encryption. Enabling secure communication for users who prioritize data sovereignty.

Portfolio

2

Apps

Free 1
Productivity100%

Explore the full Tutao report

Portfolio breakdown, audience, momentum, and every app published by Tutao.

Go deeper

Analysis in progress, available soon

What do users think recently?

Analysis in progress, available soon

View the full user-sentiment analysis

Mood gauge, ratings & review-volume history, every praise / complaint / request, and sentiment over time.

Go deeper

Analysis in progress, available soon

What is the competitive landscape for Tuta: Secure Private Calendar?

How's The Productivity Market?

Market outlook for this category

Available very soon

Strategic analysis coming soon

SWOT, key takeaways & outlook

The outtake for Tuta: Secure Private Calendar

Key Takeaways

While the app offers robust security features, users report significant technical stability issues, including frequent crashes and synchronization delays.

Where Is It Heading?

Trend analysis

Available very soon

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with editorial review, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Tuta: Secure Private Calendar, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Cite this report

Marlvel.ai. “Tuta: Secure Private Calendar Intelligence Report.” Updated Apr 18, 2026. https://marlvel.ai/apps/tuta-secure-private-calendar

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