App that adds an event to multiple Google calendars, feedback appreciated

I noticed an annoying part of my day was having to manually duplicate Google calendar events to other calendars.

I created an app that allows you to create an event that is added to multiple calendars. You can create the event on as many calendars as you want.

I wanted to see if anyone else was having the same problem and if they would like to try the tool? It will be on the Google chrome extensions store if so!

Also I greatly appreciate any and all feedback on this