Tuta Calendar: Secure Planner
by Tutao GmbH
· Productivity
· Free
On Google Play since September 2024
· Data updated
Tuta Calendar: Secure Planner is made and published by Tutao GmbH. AppBrain is an independent app data site and isn't affiliated with Tutao GmbH. The app name, icon, screenshots and description belong to Tutao GmbH and are shown as published on Google Play.
AppBrain's verdict
Well rated- Rating on Google Play
- 4.39
- 1,068 ratings
- Installs
- 36 thousand
- Last updated
- October 1, 2026
- Ads
- No ads
- Size
- 17.1 MB
Tuta Calendar: Secure Planner has 36 thousand installs. Users rate it well: 4.4 stars from 1,068 ratings.
User feedback
Ratings and reviews on Google PlayComments on Tuta Calendar: Secure Planner for Android
★★★★★
Johannes A
· Nov 6, 2025
A clean and easy to use calendar app that syncs with my tuta account, the design style matches the mail app, and the home screen widget is really useful too! Thanks!
★★★★★
Charles Abiodun
· Jun 20, 2026
This is a great calendar app, and I love that it is an end-to-end encrypted (post-quantum) calendar. I love the ability to search on the Android App (including the Tuta Mail) even while offline, unlike in some others that are also end-to-end encrypted. Great job, appreciated. Please, continue the good job. We are awaiting the Tuta Drive.
★★★★☆
Maxim Ash
· May 4, 2026
If you want to Google, but have qualms about Proton, Tuta is a great option. Having a separate Calendar app is useful, even though functionally it's not that different from the Mail app. If only the Duplicate function was working better, it would earn the full 5 stars from me. It's a great example where open-source succeeds - small apps done smartly, with only the required functionality. We don't need everything apps, TVM.
★★☆☆☆
Pooya
· Jul 17, 2026
Since I have both the mail app that already has calendar and installed this one, I get double reminders when I set a time, both the mail and calendar app create a notification at the same time, it lacks persistent notification and many simple features. Edit: alright, I just noticed you can't do anything while offline, calendars are made to be accessible everywhere to record events, I appreciate your ethics but this one needs work. Knowing this team I believe in them and know they'll fix it.
★★☆☆☆
G
· Feb 23, 2026
I love Tuta mail, but the developers can't be using the widget for themselves, it's unworkable. I depend upon a viable widget for Calendars, so I can just glance, so this is a fail. It's often showing an update spinner, multiple all-day events are only shown as one with a +1, and if there's a day with no events they've got a (what would have been fun) picture of a lazy dog taking up massive space and pushing out most events of the next day to not be visible.
Google Play Rating history and histogram
Store listing
By Tutao GmbH, from Google Play“Quantum-safe encrypted planner to schedule & manage your events & sync calendars”
Screenshots by Tutao GmbH, from the Google Play listing
Description by Tutao GmbH Written by the developer, not by AppBrain. Click to read.
PROTECT YOUR PRIVACY WITH TUTA CALENDAR - FREE, SECURE & ENCRYPTED PLANNER
Take control of your schedule with Tuta Calendar, the world’s most secure calendar app, trusted by privacy-conscious users worldwide. With quantum-safe encryption, your events, reminders, and schedules stay private. Fast, open source, and free: Tuta Calendar is built with the highest security standards. Plus, it’s perfectly integrated in Tuta Mail.
WHY CHOOSE TUTA CALENDAR?
Stay Secure
• Quantum-Safe Encryption: Your entire schedule, including event details and reminders, is fully end-to-end encrypted; only you can access it.
• Zero Tracking: No ads, no profiling, no data sharing. Your calendars are yours.
• Zero-Knowledge Architecture: We can’t see your events, meeting times, or attendees. Your schedule is invisible to us.
• Secure Event Sharing: Share events securely with Tuta users or external calendars via password-protected invites.
• GDPR-Compliant & Hosted in Germany: Protected by strict European privacy laws.
Boost Your Productivity
• Sync Across Devices: Your calendar updates instantly on mobile, web, and desktop.
• Recurring Events: Set up daily, weekly, monthly, yearly, or custom repeating events.
• Multiple Calendar Views: Switch between agenda, daily, 3-day, weekly, or monthly views with one tap.
• External Calendar Sync: Subscribe to external calendars - updates happen automatically.
• Unlimited Calendar Management (paid feature): Organize events across multiple calendars and toggle visibility effortlessly.
• Offline Access: View and manage your schedule even without an internet connection.
• Widget: View your calendar right on your home screen, customized exactly the way you want it.
Simple & Intuitive
• User-Friendly Interface: Clean, modern design with dark and light modes.
• Quick Navigation: Easily create, edit, or delete events with a few taps.
• Smart Event Reminders: Get encrypted notifications to ensure you never miss an appointment.
• Email Integration: Directly link calendar events to your Tuta Mail account for easy scheduling.
BONUS: GET TUTA MAIL WITH THE SAME ACCOUNT
Your Tuta account gives you access to Tuta Mail, the encrypted email service with the same quantum-safe security as your calendar. One account, two essential privacy tools - completely free.
WHO IS BEHIND TUTA?
Freedom fighters committed to protecting freedom of speech and your right to privacy!
• Developed & Hosted in Germany: Adheres to strict GDPR data protection laws.
• Private by Design: We can’t access your data - secure password reset ensures your privacy.
• End-to-End Encrypted from the Ground Up: Every event, contact, and reminder is encrypted by default.
TRUSTED BY SECURITY EXPERTS
"Tuta provides an exceptional level of security and privacy… If security is your priority, there’s not much better than Tuta."
- TechRadar
"Since Tuta is open source and has amazing products in development, I moved my email there."
- Journalist Dan Arel
"Tuta’s email security is unmatched. Its mobile apps are fast and user-friendly, with fair pricing and a free option."
- CyberSynchs
JOIN MILLIONS WHO TRUST TUTA
Protect Your Schedule: Download Tuta Calendar today and join millions who trust us for secure, encrypted time management.
Website: https://tuta.com
Open Source Code: https://github.com/tutao/tutanota
PRICING
Tuta offers a free plan for everyone, plus premium plans with extra features, available monthly or yearly. Every subscription includes Tuta Mail and Tuta Calendar, seamlessly syncing across all your devices.
• Free - Secure, encrypted email and calendar at no cost.
• Revolutionary - 20 GB, unlimited calendars, calendar invites and sharing, custom domains, and more.
• Legend - 500 GB, unlimited calendars, calendar invites and sharing, 30 email addresses, and advanced features.
No matter which plan you choose, your communication remains end-to-end encrypted, private, and completely free from tracking.
Recent changes:
# What's new
- Introduce Plugins in Tuta
- Nextcloud plugin inside all tuta clients
- Allow for Tutamail to run inside Nextcloud
Take control of your schedule with Tuta Calendar, the world’s most secure calendar app, trusted by privacy-conscious users worldwide. With quantum-safe encryption, your events, reminders, and schedules stay private. Fast, open source, and free: Tuta Calendar is built with the highest security standards. Plus, it’s perfectly integrated in Tuta Mail.
WHY CHOOSE TUTA CALENDAR?
Stay Secure
• Quantum-Safe Encryption: Your entire schedule, including event details and reminders, is fully end-to-end encrypted; only you can access it.
• Zero Tracking: No ads, no profiling, no data sharing. Your calendars are yours.
• Zero-Knowledge Architecture: We can’t see your events, meeting times, or attendees. Your schedule is invisible to us.
• Secure Event Sharing: Share events securely with Tuta users or external calendars via password-protected invites.
• GDPR-Compliant & Hosted in Germany: Protected by strict European privacy laws.
Boost Your Productivity
• Sync Across Devices: Your calendar updates instantly on mobile, web, and desktop.
• Recurring Events: Set up daily, weekly, monthly, yearly, or custom repeating events.
• Multiple Calendar Views: Switch between agenda, daily, 3-day, weekly, or monthly views with one tap.
• External Calendar Sync: Subscribe to external calendars - updates happen automatically.
• Unlimited Calendar Management (paid feature): Organize events across multiple calendars and toggle visibility effortlessly.
• Offline Access: View and manage your schedule even without an internet connection.
• Widget: View your calendar right on your home screen, customized exactly the way you want it.
Simple & Intuitive
• User-Friendly Interface: Clean, modern design with dark and light modes.
• Quick Navigation: Easily create, edit, or delete events with a few taps.
• Smart Event Reminders: Get encrypted notifications to ensure you never miss an appointment.
• Email Integration: Directly link calendar events to your Tuta Mail account for easy scheduling.
BONUS: GET TUTA MAIL WITH THE SAME ACCOUNT
Your Tuta account gives you access to Tuta Mail, the encrypted email service with the same quantum-safe security as your calendar. One account, two essential privacy tools - completely free.
WHO IS BEHIND TUTA?
Freedom fighters committed to protecting freedom of speech and your right to privacy!
• Developed & Hosted in Germany: Adheres to strict GDPR data protection laws.
• Private by Design: We can’t access your data - secure password reset ensures your privacy.
• End-to-End Encrypted from the Ground Up: Every event, contact, and reminder is encrypted by default.
TRUSTED BY SECURITY EXPERTS
"Tuta provides an exceptional level of security and privacy… If security is your priority, there’s not much better than Tuta."
- TechRadar
"Since Tuta is open source and has amazing products in development, I moved my email there."
- Journalist Dan Arel
"Tuta’s email security is unmatched. Its mobile apps are fast and user-friendly, with fair pricing and a free option."
- CyberSynchs
JOIN MILLIONS WHO TRUST TUTA
Protect Your Schedule: Download Tuta Calendar today and join millions who trust us for secure, encrypted time management.
Website: https://tuta.com
Open Source Code: https://github.com/tutao/tutanota
PRICING
Tuta offers a free plan for everyone, plus premium plans with extra features, available monthly or yearly. Every subscription includes Tuta Mail and Tuta Calendar, seamlessly syncing across all your devices.
• Free - Secure, encrypted email and calendar at no cost.
• Revolutionary - 20 GB, unlimited calendars, calendar invites and sharing, custom domains, and more.
• Legend - 500 GB, unlimited calendars, calendar invites and sharing, 30 email addresses, and advanced features.
No matter which plan you choose, your communication remains end-to-end encrypted, private, and completely free from tracking.
Recent changes:
# What's new
- Introduce Plugins in Tuta
- Nextcloud plugin inside all tuta clients
- Allow for Tutamail to run inside Nextcloud
Safety and technology
Found in the app by AppBrain- Ads
- No ads
- Price
- Free
- Libraries
- ?
- App size
- 17.1 MB
- Content rating
- Everyone
Technologies used by Tuta Calendar: Secure Planner
18 permissions
Subscribe to see full permission and library details
Releases
Updates seen on Google Play- Version
- 361.260929.0
- Launched
- September 2024
Alternatives
Similar apps and more from Tutao GmbH
Installs
Tracked by AppBrain- Last 30 days
- 2 thousand
- Per day
- 65
- 30-day average
- Play install range
- 10+ thousand
- Launched
- September 2024
Installs over time
Tuta Calendar: Secure Planner has been installed 36 thousand times. Over the past 30 days, it averaged 65 installs per day.
Rankings
Google Play top chartsGoogle Play Rankings for Tuta Calendar: Secure Planner
This app is not ranked
About the app and developer
About Tuta Calendar: Secure Planner
Tuta Calendar: Secure Planner is a productivity app developed by Tutao GmbH.
Install Statistics
Tuta Calendar: Secure Planner has been installed 36 thousand times. In the last 30 days, the app was installed 2 thousand times.
User Ratings
Tuta Calendar: Secure Planner is rated 4.39 out of 5 stars. The rating is based on 1.1 thousand ratings.
App Information
Tuta Calendar: Secure Planner is freely available from Google Play. The app size is 17.06 MB. The latest version available is 361.260929.0. The last update was on October 1, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play since September 2024.
App Performance Report
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