To install:-
Open www.hopmog.com/calendar-app in your phone web browser
From here you can either add the page to your browser bookmarks, or insert a shortcut on your desktop (recommended for quick access) as follows. Please note that for some browsers these instructions may differ.
 

Installing on an iPhone:
Tap the bottom of your screen and select the “Share” icon (box with an up arrow)
Scroll down to “Add to home screen”
Change the description to one of your choice and click “Add”
A Hopmog icon will appear on your home screen. Simply tap it to access the calendar.

Installing on an Android phone:
Tap the three dots … top right of your screen and select “Add to home screen”
Select Install
Change the description to one of your choice and click “Install”
A Hopmog icon will appear on your home screen. Simply tap it to access the calendar.