Tuta Calendar

Service in Calendars

German calendar app that encrypts every event detail, times included, with a free plan.

Privacy passport

4 of 5 checks

No trackingYesNo ads and no third-party trackers or analytics.
Open sourceYesApps and server code are public, so anyone can check them.
Only you can read itEncryptedSynced with end-to-end encryption: the provider can't read it.
No accountNeededYou need an account to use it.
FreeFree planA free plan, with paid upgrades.

Where it stands among 11 calendar apps

No tracking

Yes

Partly

Open source

Yes

Partly

Only you can read it

Yes

Partly

Not applicable

No account

Yes

Free

Yes

A private swap for

Listed in

CalendarsOur pickEncrypts all event details, free plan

Other calendar apps

Proton CalendarPick

Service

Calendar from Proton that encrypts event titles, notes, places and guests end to end.

Minimal tracking
Partly open
Partly encrypted
Account needed
Free plan

Android
iPhone
Web

Nextcloud

Self-hosted37.3k

Run your own cloud for files, calendars, notes and forms on a server you control, with apps for every device.

No tracking
Open source
On your server
Account needed
Free

Android
iPhone
Mac
Windows
Linux
Web

DAVx⁵

App3k

Syncs your Android calendars, contacts and tasks with any CalDAV or CardDAV server you choose.

No tracking
Open source
No account
Free plan

Android

Etar

App2.6k

Open-source Android calendar with a clean month and agenda view that works with any synced account.

No tracking
Open source
Stays on device
No account
Free

Android

Fossify Calendar

App2.3k

Offline Android calendar with widgets, CalDAV support and no internet permission.

No tracking
Open source
Stays on device
No account
Free

Android

KashCal

App461

Offline-first Android calendar that syncs with iCloud or CalDAV and searches all your events.

No tracking
Open source
Stays on device
No account
Free

Android

All 11 calendar apps