Add another one to Apple's list of third-party apps that it has endangered, as Apple Invites threatens the livelihood of event planning app Partiful.

The developers behind well-known event app and website Partiful today suggested that Apple was in violation of its own App Store guidelines for

Apple has launched a new app called Apple Invites to plan custom events, share invitations and more. Apple Invites also lets users RSVP to events, contribute to Shared Albums and engage with Apple Music playlists.