The best free and open-source alternatives to Google Calendar on Android - Get organized outside the Google bubble
If you want to keep your schedule private — or simply don't want anything to do with Google — there are some totally decent options available for Android that you should check out.
Some will also sync to your own Nextcloud/Owncloud hosting.
See The best free and open-source alternatives to Google Calendar on Android
While you may have already checked out our list free and open source Gmail alternatives, you may not even be aware free and open source alternatives to