Tuta Calendar icon

Tuta Calendar

Tutao GmbH
Internet Tools
Version
360.260922.0
Size
68.6 MB
Requires
Android API 26+
4.4 / 5 · 1,093 ratings 10,000 downloads

Updated Oct 10, 2026

Quick answer

Quantum-safe encrypted planner to schedule & manage your events & sync calendars

Take your privacy to the next level with the secure Tuta Calendar app. This encrypted time-management tool is the most private way to organize your busy schedule – and it’s quick to navigate, comes with dark and light mode, plus, it’s perfectly integrated with the Tuta Mail app.

SECURE CALENDAR

* Quantum-safe encryption: End-to-end encrypted data exchange with all Tuta Calendar users and with users of other calendar apps (via optional password-protected event invites). * No ads, no tracking, and no data sharing: We protect your privacy. * Zero-knowledge architecture: Entire events, including event notifications, are encrypted and hidden from our servers. We do not know when your meetings are taking place, who they are with, or what they are about. * Based in Germany: All data is safeguarded by strict German data protection laws. * Fully GDPR-compliant

FULLY FEATURED

* **SYNC ON ALL DEVICES:** Your Tuta planner syncs automatically on all devices and browsers. * **RECURRING EVENTS:** Use daily, weekly, monthly, yearly or custom repetitions. * **MULTIPLE CALENDAR VIEWS:** Switch in one tap between agenda, daily, weekly, and monthly view. * **SYNC EXTERNAL CALENDARS:** Events will automatically sync if the owner adds or updates events or meetings on external calendars. Once subscribed, no action is needed. * **MANAGE UNLIMITED CALENDARS (paid feature):** You can toggle different calendars into view with a single press or leave all events visible for a complete overview. * **EVENT REMINDERS:** Never miss a date. Tuta’s zero-knowledge reminders make sure you never miss an appointment. * **LINK CALENDAR EVENTS TO EMAILS AND CONTACTS:** Your Tuta Calendar is directly linked to your Tuta Mail account, so when creating events you can easily invite your contacts or send invites to others via email. * **OFFLINE SUPPORT:** Independent standalone app so you can check your schedule both online and offline!

Screenshots

Tuta Calendar screenshot 1
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What’s new

see: https://github.com/tutao/tutanota/releases

How to install

  1. Download the APK from the button at the top of this page.
  2. Allow “Install unknown apps” for your browser or file manager only, not for every app.
  3. Open the downloaded file and confirm the installation.
  4. If installation fails with “App not installed,” remove an earlier build of the same app first. A signature conflict is the usual cause.

Data safety

  • Every file is checked against its published SHA-256 before it is listed.
  • Files are scanned for malware on every update.
  • The permissions each app requests are listed on its own page.
  • Read the full safety policy for how we test, flag, and delist files.

Frequently asked questions

What is Tuta Calendar?
Quantum-safe encrypted planner to schedule & manage your events & sync calendars
Who develops Tuta Calendar?
Tuta Calendar is developed by Tutao GmbH.
Which Android version does Tuta Calendar require?
Tuta Calendar requires Android API 26 or later.
What is the current version of Tuta Calendar?
The synchronized F-Droid version is 360.260922.0.
Which license does Tuta Calendar use?
The signed F-Droid metadata lists GPL-3.0-or-later.
Where is the source code for Tuta Calendar?
https://github.com/tutao/tutanota

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