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Tuta Calendar: Secure Planner

Tuta Calendar: Secure Planner

Encrypted Events & Reminders

149 ratings
61 reviews
🔧 Utilities
📊 Productivity
Free
In-App Purchases

Details

  • Released
  • Updated
  • October 2, 2024
  • July 21, 2026

Developer

Tutao GmbH
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iphone
ipad
🧾$3.99 - $99.99
In-App Purchase↘︎
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Reviews summary↘︎
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❓5 answered
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About

This secure calendar app offers end-to-end encryption to protect your events and reminders. It features a user-friendly interface, cross-device syncing, and smart reminders, with a free plan and optional premium upgrades.

✓Quantum-safe end-to-end encryption
✓Zero tracking and zero-knowledge architecture
✓Secure event sharing
✓Cross-device syncing
✓Multiple calendar views
✓Smart event reminders
✓Offline access
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What users say

Summarized from real user reviews of Tuta Calendar. Based on 149 reviews and a 4.6/5 average, it highlights the 14 positives and 37 negatives reviewers mention most about this Productivity app.

Positive things

  • 🔒Privacy and security focused
  • 👍Streamlined and minimalist design
  • 🔄Calendar subscriptions work well
  • ✨Good color schemes and views
  • ✅Private alternative to big tech
  • 👨‍👩‍👧‍👦Good for family use
  • 💡Well-designed and functional
  • 💯Privacy protection is a priority
  • 🚀Fast and efficient
  • 🌟Updates improve functionality
  • 🔒Data safety is a priority
  • 😊User-friendly interface
  • ✨Visually appealing design
  • 🌟Great encrypted calendar

Negative things

  • 🐛Frequent crashes and bugs
  • ⚠️Requires account/login
  • 📅Widget not working/limited
  • ❌No watch app support
  • ⏳Slow loading/reloading events
  • 🔕Double reminders from Tuta Mail/Calendar
  • 📉Data loss issues
  • 🗓️Missing holiday support
  • 🤔Calendar subscriptions can duplicate entries
  • 🚫Cannot delete calendars/subscriptions
  • 😵Cryptic error messages
  • ♿Poor readability for low vision
  • 🖱️UI issues with text size and color
  • 📅Default appointment length is 30 mins
  • 🗓️Week view limited to 8 hours
  • 🚫No on-device notes/non-login option
  • 🤏Cannot zoom/pinch to adjust time intervals
  • 👆Cannot move events by dragging
  • ❓Account creation issues (clock puzzle)
  • 🗂️Calendar entries not saving
  • 🎨Limited color coding for appointments
  • 📅App icon doesn't show current date
  • 🔢Day numbers not bold enough
  • 📅Month view shows only 4-5 letters of event
  • 🗓️No quick access to distant dates
  • 😊No emojis in events
  • 🚫FaceID login issues for free accounts
  • ❌Not user-friendly for planning
  • 🗄️Free tier lacks family planner
  • 😫Login issues (invalid credentials)
  • ❓Widget blank at times
  • 📅Widget only shows one day
  • 🚫No option to open locations in other map apps
  • 📅No week numbers displayed
  • 🚫No month view widget
  • 📅Limited display of event details
  • 🤔Usability issues compared to native apps
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+1

What's New in Tuta Calendar

355.260720.0

July 21, 2026

Calendar improvements: - Timezone support for events - Displaying reminders in the event preview - Calendar alarms now respect 12/24 hour format - Small bugfixes A detailed list of the technical changes can be found on our client GitHub repository: https://github.com/tutao/tutanota/releases

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Subscription plans

Legend (Yearly)

One year of the Legend plan.

$99.991 Year
How to cancel Tuta Calendar subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

not working-not a review

Hey there, I’m not able to log into account just after creating it. Even though password saved. Not sure what to do, can’t even delete the address just created. I really just like support, but don’t know how to get it.
jul0815jul0815

Response from developer

Hi, that is odd and of course should not be that way. Could you please contact us via the support function in app or directly at hello@tutao.de, so we can have a closer look at your case and help you asap.

Watch Support

I would love to see an App for the Watch.
I’m Lucky LukeI’m Lucky Luke

Response from developer

Thanks for your feedback and support of Tuta! We deeply respect your input, and we will try to combine your feedback with our roadmap, in order to provide a better experience!

Still crashes and account

The fact that it still crashes and when managing to launch, requires an account is an absolute no go
AlanBerg324AlanBerg324

Response from developer

Hi, that is odd and of course should not be that way. Could you please contact us via the support function in app or directly at hello@tutao.de, so we can have a closer look at your case and help you asap.

How is it ‘private’ and ‘secure’ when you ask for email?

Makes no sense

Edit: thanks for the reply. To clarify, I can’t use the calendar without logging in. I don’t think an account is needed to put in my plans on a calendar
MarleydoMarleydo

Response from developer

Hi, we never ask for email, phone number or any other personal info. Could you please elaborate and report abuse via the app or at abuse@tutao.de.

Keine Termine und leicht einen sitzen

Tuta Kalender muss ein großer Fan oder Verehrer von Karl Lagerfeld sein. Anders kann ich mir nicht erklären, dass ich jeden einzelnen Tag als Ansicht in meinem großen Widget auf dem Startbildschirm erhielt: heute keine Termine mit einer kleinen Zeichnung von einem Mann, der zurückgelehnt in einem Sessel saß und sich anscheinend ein Gläschen genehmigte. Dass ich aber tatsächlich teilweise 3, 4 oder auch 6 Termine im Kalender drin stehen hatte? Das wollte mir weder das Widget noch die App so recht verraten, denn auch Benachrichtigungen oder Erinnerungen erhielt ich keine.
Dasselbe übrigens auf meinem Android Smartphone und Android Tablet.
Kurzum: Jetzt habe ich wirklich keine Termine mehr und Dank meiner neu gewonnenen Freizeit am Tage nun öfter mal leicht einen sitzen.
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Hertha von HintenHertha von Hinten

Response from developer

Hallo, das ist seltsam und sollte natürlich nicht so sein. Könnten Sie sich bitte über die Support-Funktion in der App oder direkt unter hello@tutao.de an uns wenden, damit wir uns Ihren Fall genauer ansehen und Ihnen so schnell wie möglich helfen können?

See 56 more reviews

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User experience

🐞

Reported Bugs

19 issues

App crashes frequently

Bug

Widget is not working or is blank

Bug

Calendar events not saving or changes not saving

Bug

App logs out automatically and shows invalid credentials

Bug

Double reminders for appointments

Bug

Lost important information/data

Bug

Calendar subscriptions duplicate entries

Bug

Cannot delete calendars or calendar subscriptions

Bug

Cryptic error messages

Bug

App constantly crashing on opening

Bug

Login issues

Bug

FaceID login not working for free accounts

Bug

Account creation issues (clock puzzle)

Bug

Search function doesn't work on app

Bug

Events from calendar subscriptions not syncing

Bug

App ignores OS font size settings

Bug

Issues with recurring events being duplicated

Bug

Calendar entries not visible without connection

Bug

Events reload every time the app opens

Bug
✨

Requested Features

31 requests

App for the Watch

Feature

Icon shows current date

Feature

Ability to see holidays marked

Feature

Import from Apple calendar

Feature

Adjustable app opening view (e.g., month view)

Feature

Default appointment length setting

Feature

Color code appointments on the same calendar

Feature

Widget that shows more than one day

Feature

Widget that shows entire month

Feature

Ability to see monthly and agenda view simultaneously

Feature

Option to zoom/pinch time intervals

Feature

Move event blocks by dragging

Feature

Custom settings for specific days of the week

Feature

Week numbers displayed

Feature

Full-featured calendar

Feature

Option to open locations in other map apps

Feature

More customizability in UI

Feature

Better readability for low vision users

Feature

Adjustable text size respecting OS settings

Feature

More compact week view

Feature

Display more event details in month view

Feature

Quick access to distant calendar days

Feature

Emojis in events

Feature

Family planner in free tier

Feature

On-device notes/non-login option

Feature

Support for holidays by country/region

Feature

Dark mode option

Feature

Advanced analytics dashboard

Feature

Ability to expand week view to include more than 8 hours

Feature

Sync with other calendar apps

Feature

More robust search functionality on mobile app

Feature

FAQ

What does Tuta Calendar do?

Tuta Calendar is a secure and encrypted planner app that helps you manage your schedule, events, and reminders. It uses quantum-safe end-to-end encryption to ensure that only you can access your calendar data, offering a high level of privacy and security.

What are the key features of Tuta Calendar?

Key features include quantum-safe end-to-end encryption for all your data, zero tracking and zero-knowledge architecture, secure event sharing, cross-device syncing, multiple calendar views, smart event reminders, and offline access. It also integrates seamlessly with Tuta Mail.

How much does Tuta Calendar cost?

Tuta Calendar offers a free plan that provides secure, encrypted email and calendar services at no cost. For users needing additional features like unlimited calendars and more storage, premium plans are available on a monthly or yearly subscription basis.

What devices is Tuta Calendar compatible with?

Tuta Calendar syncs seamlessly across mobile, web, and desktop devices. This ensures that your events and schedule are always up-to-date no matter which device you are using.

What are common use cases for Tuta Calendar?

Common use cases include securely planning personal appointments, managing work schedules, coordinating events with others through secure sharing, and setting up recurring reminders for daily, weekly, or monthly tasks, all while maintaining a high level of privacy.