Google Calendar offers a free version that includes basic features suitable for personal use, while additional features are available through Google Workspace subscriptions.

While Google Calendar can be accessed offline on mobile devices, an internet connection is required for full functionality, including syncing events and accessing shared calendars.

You can contact Google support through the Google Calendar Help Center, where you can find resources, FAQs, and options to submit feedback or report issues.

To manage or cancel your Google Calendar subscription, you can access your Google Account settings, navigate to the "Subscriptions" section, and follow the prompts to make changes.