Our Day is a private Android calendar for one household. It shows the Google calendars those people have allowed, together, on each phone.
Each phone can say who is using it. That choice changes which commitments stand out. It does not sign anyone in and it does not grant access to another person’s Google account.
Google Calendar stays the source of the appointments. Our Day asks only for permission to view calendars. It does not change or delete events in Google.
The app is for that household. It is not offered as a public download.