Calendar is a free iPhone app developed by Apple Inc. It falls under the category of Business & Productivity. With Calendar, you can easily keep track of your schedule and share it with others. The app allows you to create separate calendars for home, school, work, and more.

One of the key features of Calendar is the ability to view all your calendar accounts in a single app. You can see all your events in List, Day, Week, or Month view, and even Year view on iPad. This makes it convenient to have an overview of your schedule at a glance.

Creating a new event is quick and easy with Calendar. Simply touch and hold a blank space in your day to create a new event, or drag an appointment to change your schedule. Additionally, you can add the address of your event to receive Time to Leave notifications based on the estimated travel time.

Calendar also allows you to send and receive meeting invitations with iCloud, Exchange, and CalDAV servers. You can even add a special calendar for the birthdays of people in your Contacts list. Furthermore, you have the option to subscribe to calendars for holidays, your favorite sports teams, and more.

With its user-friendly interface and seamless integration with iCloud, Yahoo, Google, and other accounts, Calendar is a reliable tool for managing your schedule and staying organized.