2025-09-18 00:00:00 GroupCal is the most powerful platform for individuals and businesses, to share calendars with groups, families, customers, followers and any community. Inviting members to a shared calendar is quick and easy. Simply send a link to members, or invite them using their phone numbers from your contact list. They will be able to instantly view the calendar on any device. Members of shared calendars get real time updates when events are added or updated. GroupCal is free, easy to use, and available on any mobile device.