Phone with the Tuta Calendar app opened displaying three calendar appointments.

Tuta

APP RATING

4.5

ACCOUNTS

+10 million

Zero-Knowledge Calendar: Secure, Private & Intuitive

Your personal and professional events deserve to be protected. Choose the free Tuta Calendar to keep them safe.

Explore Tuta Business for professional use

Securely organize your life with our encrypted calendar

Tuta Calendar is the only zero-knowledge calendar with quantum-safe encryption, making sure all your events are protected from snooping and prying eyes.

Whether you schedule events, receive event invitations or share your calendar with others, all steps in the Tuta Calendar are automatically encrypted end-to-end. Finally, your data belongs to you, no one else can access it!

Illustration of a man sitting at a computer with a symbol of a key in the middle of a shield on the screen and a 31 above the screen symbolizing a calendar.

Plan and organize your busy schedule in privacy.

Intuitive, clean design for easy organization

Intuitive UI lets you plan all appointments, business meetings and repeating tasks easily.

Laptop screen showing the Tuta Calendar in week view with different appointments scheduled.

Encrypted, zero-knowledge calendar guarantees privacy

Encryption and zero-knowledge architecture ensure your schedule stays private.

Never miss an event

Tuta Calendar push notifications flexibly remind you of your events. The notifications are sent securely so that no third party will be able to track you.

Maximum login security

Easily switch on two-factor authentication to protect your login credentials from malicious attacks.

Stay organized, on all your devices

View and organize your schedule wherever you are with the free Tuta Calendar app for Android and iPhone.

iPad with the Tuta Calendar app open in week view and displaying different scheduled appointments, next to a mobile phone with the Tuta Calendar open in day view and displaying the day's appointments.

Free open source desktop clients

Tuta Calendar has free and open source desktop clients for Windows, macOS and Linux.

Multi-user support and sharing

Share calendars and events with your family, organization or company with a few tabs.

Turn ON privacy

The protection of your private data is not a priority to services like the Google or Microsoft calendars.
It's time to turn on privacy with Tuta Calendar and its built-in encryption!

Your data, your rules

I chose tutanota after considering a few others. This is perhaps simple compared to some other mail apps, but it contains a useful calendar (which I share with family) in addition to the email, and sometimes simple is preferred. The complete encryption offers real peace of mind when it seems something with our info is being hacked every other day, and Tutanota is making that better than anyone else I've seen. All in all, considering price, features, & updates, I've been happy with it.

Ezlin

I have found tutanota great to use, both on my Android phone and my laptop. I used it as a free app and enjoyed it so chose an annual subscription. The option to secure an email with a password or not is a handy feature. I have just begun using the calendar feature provided.

Douglas Bennett

I use tutanota 2 weeks now and I didn't find something to keep me away. Black beautiful GUI, easy to navigate throughout app, encrypted messages with password, even the login has 2FA, there is no ads. I keep log in and off fast without a single problem. There is a calendar and contacts savings option. Unbelievable. Give it a try people. You won't regret it.

Trinity
Even better now with calendar integration. The only real thing I’m missing is the ability to resize text. Ok, found the double tap thing so take that back. 6 stars.

ANONYMOUS

Has basic email and calendar. No more big tech tracking for me! Thank you Tutanota!

ANONYMOUS

Clear, intuitive interface, very useful calendar and events. Just must have.

ANONYMOUS

On the go, offline, always.

Encrypted calendars always by your side.

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Seamlessly integrated with email

Tuta Calendar comes with seamlessly integrated encrypted emails and contacts so that you can easily handle all your communication confidentially in one place. Contacts can be synced on iPhones, iPads and Android devices so that you can use Tuta as your main contacts app, knowing that also the data of your friends are well guarded.

Easily say "no" to Big Tech surveillance and turn on privacy!

iPad with the Tuta Mail app opened displaying the inbox on the left and an opened email on the right. In front of the iPad is an enlarged Email, Search, Contacts and Calendar panel, with Email being highlighted.

Tuta Calendar for business

An office worker who is protecting his emails with Tuta Mail's automatic encryption.

Tuta Calendar enables you and your team to stay organized securely and to co-ordinate with ease.

Tuta offers end-to-end encrypted products for businesses in line with the strict GDPR data protection regulation. With Tuta you can be sure that your sensitive business information remain confidential.

Your calendar knows everything about your work and personal life - we make sure your valuable information stays private.

Tuta Calendar FAQ

What is Tuta?

Tuta (formerly Tutanota) launched in 2014 to create a better web. Today, Tuta is the most secure calendar, email, and contacts service. We are innovation leaders in encrypted communication and have already implemented post-quantum secure encryption to keep your private data safe from future threats. We are at the forefront of the privacy revolution by offering everyone in the world private email, calendar, and contacts for free.

Is the information on my Tuta Calendar safe?

Yes. The seamlessly integrated end-to-end encryption makes the Tuta Calendar one of the most secure calendars available worldwide. The Tuta Calendar protects all your events and even your push reminders from prying eyes. No unauthorized person can decrypt or gain access to your personal or business events stored in the Tuta Calendar.

Can I import and sync all my calendars?

Yes. You can easily import all your calendars to Tuta via the settings. Once imported your calendars sync automatically across all your devices, no matter where you use the Tuta app. Find details on how to import your calendars here..

Does the calendar have event reminders?

Yes. The Tuta Calendar pushes event reminders reminders directly to your Android, iPhone, iPad or PC to make sure you never miss an event, even when offline. These reminders are kept hidden from your phone's operating system so that not even Google or Apple can see your events.

Is the Tuta Calendar available on mobile devices?

Tuta has encrypted mobile apps for Android and iOS allowing you to access your schedule, plan events, and stay organized easily from your smartphone. Tuta’s secure calendar is also available on web and desktop clients.

Download the Tuta app now.

Can I create and share calendars?

Yes. You can create an encrypted calendar that all people or only certain employees in your organization can access. When sharing your calendar, you can assign different access rights: Read only, Read and write, Write and manage sharing. For instance, you can have a company-wide group which you use to share important appointments, public holidays, vacation days and repeating events such as team meetings. All data in the Tuta Calendar is always encrypted - even when you share your calendar.