There is no installation. Just unzip the downloaded package and you’re ready: no key and no log file written by outside of it’s installation folder. You can mark the day’s events, tasks and reminders with alarms.You can set the tuition for them. Support the iCal standard to import and export. There are different views on the calendar: monthly, weekly, daily and personalized.You can create several calendars with different colors thus being able to identify the events easily.