Android
Tap on 'More' on the bottom menu
Tap 'Appointments'
Tap 'Add an Appointment'
Set the date and time, sync with your Google Calendar, then tap 'Done' to save
iOS
Tap on 'More' on the bottom menu
Tap 'Appointments'
Tap the + icon on the upper right corner
Set the date and time, sync with your Apple Calendar if needed, then tap 'Save'
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