Looking for a calendar app for both Mac and Android with specific features

I'm looking for a calendar app on both Mac and Android that:  syncs with Apple and Google Calendar. allows me to modify my own entries of both calendars. And uses the fields that are the same (shared) in both calendars. allows me to modify entries of shared Apple Calendars (so, calendars of others)  I tried https://www.onecalendar.nl/


https://www.reddit.com/r/macapps/comments/1fy0bcv/looking_for_a_calendar_app_for_both_mac_and/