Cozi is the app that gets your whole family on the same page. You can add each family member to the app and sync up via email.
The Cozi calendar is color coded and will sync up with your google and Microsoft calendars if you like, so you can know exactly what each family member is doing with all the information from all of the schedules in one place.
Lists are also shared in Cozi, so any family member can add a grocery item, school necessity, or even a gift to the family shopping list. As an added feature there are recipes you can share in the app to help with shopping trips too.
This free app makes things simple for families on the go, and if you're willing to spend a little extra, you can buy a contacts feature, a birthday calendar and more.