App store / Calendar apps
Google Calendar
Google Calendar is a time management and scheduling service developed by Google. Allows users to create and edit events, with options available for type and time. Available to anyone that has a Gmail account on both mobile and web versions.
Outlook Calendar
Microsoft Office 365 is a suite of apps that helps you stay connected with others and get things done. It includes but is not limited to Microsoft Word, PowerPoint, Excel, Teams, OneNote and OneDrive. Office 365 allows you to work remotely with others on a team and collaborate in an online environment. Both web versions and desktop/mobile applications are available.