1. Various memo (text, voice, handwriting) function
2. To do
-It tells you something you can forget. (To do today, To do tomorrow)
3. Schedule
-You can register a schedule and check the schedule in the calendar.
-You can select your preferred location at the time of registration.
-Register your schedule (on-time, 10 minutes ago, 30 minutes ago, etc.) and receive a notification.