Yes, this is possible - provided that the following criteria are met by the people you wish to involve in the planning:

●   Their device(s) are compatible with iCloud Share technology. Note for iOS devices they need to be running iOS 10 or above; for Mac devices they need to be running Mac OSX 10.12 or above.

●   The people involved will need to have a valid iCloud account.

●   Their device(s) need to have Internet access.

●   Wedding Planner PRO needs to be downloaded.