Billing
I’m being charged 99 cents per month. How do I find out what it is for?
iPhone 8, iOS 13
Question marked as
See: See or cancel your subscriptions - Apple Support
Also note the lower section of that link -- it could be for an upgrade from the free 5 GB iCloud storage to a 50 GB plan. To check (and also to downgrade if desired) see information in Downgrade your iCloud storage - Apple Support