1Private Calendar
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Private Calendar
Private · Secure · European

Your encrypted online calendar.

A calendar that belongs only to you. Your calendar is stored and synchronized end-to-end encrypted.

Start for free → How does this work?
Week view · Tap the phone
Calendar content end-to-end encrypted Hosted in Germany Documented cryptography
Weekly view
Features

Everything a calendar needs – without spying on you.

Appointments, tasks and reminders, neatly organized. And underneath, an architecture that treats your privacy not as an option, but as its foundation.

Store and sync end-to-end encrypted

For storage and synchronization, your events are encrypted on your device before being sent to the server. Calendar and master keys reach the server only in encrypted form, never in plain text.

This is how Private Calendar protects your appointments

Encrypted before it leaves your device.

Calendar content is stored as encrypted blocks. With external iCal link subscriptions, the server receives neither the private link nor the source content in plain text.

Encrypted on your device

Every appointment is encrypted locally with AES-256-GCM before it is synchronized.

Sync encrypted

The server only stores calendar content as encrypted blocks. Link subscriptions are loaded directly from a signed-in Android device or iPhone.

Only you have the key

The key stays with you. Without it, the data remains permanently unreadable – for everyone.

Check open source cryptography yourself

The published security modules are open source under Apache 2.0. Source code, specifications and verification steps are available.

Check encryption yourself View source code
Pricing

Start for free. More if needed.

Both plans use the same end-to-end encryption. Premium increases limits and adds iCal subscriptions, which the Android and iPhone apps retrieve directly and encrypt before synchronization.

Free
€0
Permanently free, with no time limit.
  • 2 calendars of your own
  • Appointments, tasks & reminders
  • Own/imported content: E2E & Sync
  • 25 MB storage
  • Export (JSON/ICS)
Start for free
Premium
€18.00 / year
Equivalent to €1.50 per month (introductory price) · or monthly at €2.99 · cancellable with one month’s notice after the initial term.
  • Up to 25 calendars of your own
  • Share your own calendars
  • External iCal subscriptions
  • Widgets for Android and iPhone
  • Booking links: share free times, up to 15
  • 500 MB storage
  • Multiple scheduled reminders*
  • Task deadlines
  • Working time counter
  • Sleep window with sleep reminder
  • Twilight in the daily and weekly grid
View prices

*Notifications are not guaranteed and should not be the sole control of critical deadlines. Germany: Final prices, payment via Stripe, no VAT under § 19 UStG. Austria, Switzerland, Finland, Denmark, the Netherlands, Ireland and Sweden: The taxes applicable there are added to these prices; payment via Link. The pricing page shows the total price by country selection. New subscriptions only for these eight countries. · 14-day right of withdrawal.

Frequently asked questions

Good to know.

What does “end-to-end encrypted” mean?
Data is encrypted on your device before storage and synchronization. Your calendar and master keys are generated there and reach the server only in encrypted form; your password protects access to them. Events, tasks and their details synchronize as encrypted calendar blocks. Neither the operator nor anyone who obtains the database can read those blocks. Decryption takes place locally on your devices and, for explicitly shared content, on recipients’ devices. This uses AES-256-GCM and local key management whose source code is published for review.
Where is my data stored?
On servers in Germany, under European data protection. There is also a geographically separate, exclusively encrypted offsite backup in Switzerland.
How do I move from Google, Outlook or Apple?
Export your appointments from your previous provider as an .ics file and import it in the browser, Android or iPhone app. Events are encrypted on your device before uploading. The instructions for each provider — Google, Outlook and Apple — are under Switch calendars.
Can I use Private Calendar for free?
Yes. The free plan includes two calendars of your own and 25 MB of storage, with no time limit. That's enough for tens of thousands of appointments, or ten appointments per week for many decades. Premium is optional, increases limits and adds features such as calendar sharing, iCal subscriptions and booking links.
Do I need a credit card to start?
No. You simply create an account and get started. You only need a payment method if you later choose to upgrade to Premium.
Platforms

Runs where you are.

One account, the same personal and imported appointments everywhere, synchronized and end-to-end encrypted. The options differ per platform.

Desktop
Windows · macOS · Linux
Fully supported

Runs in current versions of Chrome, Firefox, Edge and Safari. A PWA installation is possible as long as the browser offers it; browser reminders only work when the application is open.

Android
Native app · Android 8 or later
Fully supported

Native app with background sync, reminders and direct updating of external iCal subscriptions. Android, permissions and energy saving rules can delay retrieval and delivery.

GET IT ONGoogle Play
iPhone & iPad
Native app · iOS 17 or later
Fully supported

Native app with background sync, reminders and direct updating of external iCal subscriptions. iOS, permissions and energy saving rules can delay retrieval and delivery.

Download on theApp Store

Your data is encrypted on every device – the key stays with you, whichever device you sign in on.

Ready for a calendar that's yours?

Set up in minutes. Calendar content end-to-end encrypted, no ad trackers. The Android app is available on Google Play and the iPhone app is available on the App Store. Mobile apps update link subscriptions directly.

Start now for free →