this is strange to me...I feel this could have been an add-on to the Calendars app. When creating an Event, if could just ask "would you like to create an invitation?" and then proceed to do what AppleInvites does.'
Maybe this creates bloat to a streamlined app, maybe some wouldn't need this and would never "waste" space on their phone for it...now to take it one step further besides downloading ANOTHER app, I can only CREATE an invite as a subscriber to Apple iCloud+...ridiculous.
that said, I downloaded it and started to create a test event. AppleInvites has great features for location with map, weather info...Music and Photos capabilities (perhaps this is why it is tied to iCould+but can't you JUST have iCloud+ for storage and not Music?)
We have family get-togethers and everyone now has an iPhone so this could be really nice. BUT, only our family has iCloud+ so, it only really works for the parties at OUR house. Bummer Apple, Bummer.