how do i remove iphone 11 calendar app?

Thanks for the response. However when I previously tried that it told me that it wouldn’t delete the information. I wanted to start fresh because when I used the Transfer to IOS app from my android it sent triplicate of everything on my calendar. Because the app said the transfer failed the first three times and it wasn’t until the fourth it was successful. But the transfer actually did work the first time and what a mess. Anyway I did do what you said and downloaded another calendar app and thankfully it transferred my calendar events only once and not triplicate. So problem solved for me.