Summary:
- The article discusses the Tuta Calendar app, which is an open-source calendar application available on the F-Droid app store.
- The app is designed to be a privacy-focused alternative to mainstream calendar apps, with features like end-to-end encryption and the ability to host your own calendar server.
- The article highlights the app's key features, such as its clean user interface, support for multiple calendars, and integration with other privacy-focused tools like Tuta Mail.