Tuta Calendar

Tuta Calendar is an end to end encrypted calendar service from Germany. Appointments are encrypted so that the provider cannot read them, and the service is available as an app for iOS and Android or through the web app.

Tuta hosts in data centres around Germany and runs its servers and offices on green energy. As an open source European alternative to US calendar services, it suits people who already use encrypted email and want their appointments protected the same way.

Pricing

The free plan allows one calendar and up to 1 GB of storage. Larger plans such as Revolutionary at EUR 3 per month add calendar sharing, unlimited calendars and email.