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!

Anti-Features

This app has features you may not like. Learn more!

• Non-Free Network Services

  This app promotes or depends entirely on a non-free network service

  Rely on tuta.com

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid

• Version 355.260730.0 (325) suggested Added on Aug 03, 2026

  arm64-v8a armeabi armeabi-v7a mips mips64 x86 x86_64

  This version requires Android 8.0 or newer.

  It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

  Permissions

  • view network connections
    Allows the app to view information about network connections such as which networks exist and are connected.
  • run foreground service
    Allows the app to make use of foreground services.
  • have full network access
    Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
  • show notifications
    Allows the app to show notifications
  • read your contacts
    Allows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
  • read the contents of your shared storage
    Allows the app to read the contents of your shared storage.
  • run at startup
    Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
  • ask to ignore battery optimizations
    Allows an app to ask for permission to ignore battery optimizations for that app.
  • Schedule precisely timed actions
    This app can schedule work to happen at a desired time in the future. This also means that the app can run when you're not actively using the device.
  • use biometric hardware
    Allows the app to use biometric hardware for authentication
  • Schedule alarms or event reminders
    This app can schedule actions like alarms and reminders to notify you at a desired time in the future.
  • use fingerprint hardware
    Allows the app to use fingerprint hardware for authentication
  • control vibration
    Allows the app to control the vibrator.
  • prevent phone from sleeping
    Allows the app to prevent the phone from going to sleep.
  • modify your contacts
    Allows the app to modify the data about your contacts stored on your phone. This permission allows apps to delete contact data.
  • modify or delete the contents of your shared storage
    Allows the app to write the contents of your shared storage.
  • de.tutao.calendar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

  Download APK 68 MiB PGP Signature | Build Log

• Version 355.260720.0 (319) - Added on Jul 31, 2026

  arm64-v8a armeabi armeabi-v7a mips mips64 x86 x86_64

  This version requires Android 8.0 or newer.

  It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

  Permissions

  • view network connections
    Allows the app to view information about network connections such as which networks exist and are connected.
  • run foreground service
    Allows the app to make use of foreground services.
  • have full network access
    Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
  • show notifications
    Allows the app to show notifications
  • read your contacts
    Allows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
  • read the contents of your shared storage
    Allows the app to read the contents of your shared storage.
  • run at startup
    Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
  • ask to ignore battery optimizations
    Allows an app to ask for permission to ignore battery optimizations for that app.
  • Schedule precisely timed actions
    This app can schedule work to happen at a desired time in the future. This also means that the app can run when you're not actively using the device.
  • use biometric hardware
    Allows the app to use biometric hardware for authentication
  • Schedule alarms or event reminders
    This app can schedule actions like alarms and reminders to notify you at a desired time in the future.
  • use fingerprint hardware
    Allows the app to use fingerprint hardware for authentication
  • control vibration
    Allows the app to control the vibrator.
  • prevent phone from sleeping
    Allows the app to prevent the phone from going to sleep.
  • modify your contacts
    Allows the app to modify the data about your contacts stored on your phone. This permission allows apps to delete contact data.
  • modify or delete the contents of your shared storage
    Allows the app to write the contents of your shared storage.
  • de.tutao.calendar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

  Download APK 68 MiB PGP Signature | Build Log

• Version 354.260707.0 (317) - Added on Jul 10, 2026

  arm64-v8a armeabi armeabi-v7a mips mips64 x86 x86_64

  This version requires Android 8.0 or newer.

  It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

  Permissions

  • view network connections
    Allows the app to view information about network connections such as which networks exist and are connected.
  • run foreground service
    Allows the app to make use of foreground services.
  • have full network access
    Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
  • show notifications
    Allows the app to show notifications
  • read your contacts
    Allows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
  • read the contents of your shared storage
    Allows the app to read the contents of your shared storage.
  • run at startup
    Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
  • ask to ignore battery optimizations
    Allows an app to ask for permission to ignore battery optimizations for that app.
  • Schedule precisely timed actions
    This app can schedule work to happen at a desired time in the future. This also means that the app can run when you're not actively using the device.
  • use biometric hardware
    Allows the app to use biometric hardware for authentication
  • Schedule alarms or event reminders
    This app can schedule actions like alarms and reminders to notify you at a desired time in the future.
  • use fingerprint hardware
    Allows the app to use fingerprint hardware for authentication
  • control vibration
    Allows the app to control the vibrator.
  • prevent phone from sleeping
    Allows the app to prevent the phone from going to sleep.
  • modify your contacts
    Allows the app to modify the data about your contacts stored on your phone. This permission allows apps to delete contact data.
  • modify or delete the contents of your shared storage
    Allows the app to write the contents of your shared storage.
  • de.tutao.calendar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

  Download APK 67 MiB PGP Signature | Build Log