Allcal can be used by everybody for a variety of use-cases. Listed below you will find some of the more obvious use cases of Allcal has helped people in their situations. Allcal is the community-driven calendar app that helps you get together with the people who matter. Allcal is about making it easier to connect with community through calendar. It doesn’t matter if throwing a big 3-day conference or a monthly game night - Allcal helps keep everyone updated, organized, and ready for the next big event.