I hate putting my business on GOOGLE CALENDAR OR MICROSOFT APPS IN OUTLOOK because they STEAL THAT DATA AND SELL IT TO MARKETERS... So I when I need a business APP I use open source and often write my own UIs for them and I like to create my stuff online so I built my OWN custom database calendar app for my FAMILY events and reminders - I wont share my LIVE one but here is the sample demo.
View Data Apps Demo