Startup Idea: Private Sharing Calendar App

Startup idea to develop a calendar app that allows for both desktop and mobile updating, with the unique feature to share its contents privately (view-only) via a dedicated link, eliminating the need for others to register to the service. The app should support multiple calendars within it.

I am a busy mom, and part of a busy company. I need a calander app that I can update from my desk top or phone, which will allow me to share it with out making it completely public, or requiring other people to register to the service.

For example, a dedicated link to allow others to view (but not edit) this calender, that is only viewable to people that I've sent the link to.

I have tried several calender apps but I can't find one with this feature.

The app needs to allow the user to make multiple calenders in one app. I have tried finding a solution. I cant find an app that meets my needs. My current solution is to print and hand out copies of my calender which is really annoying.