The app gives the user the option to gather more information about the island. To contact the management of the island by phone or text. The get a better impression of the island by watching the the pictures. Also be able to send a direct availabily request and asking for a price quote.
Immediately see the room rates.
The mangement will be able to update the information to the users by sending them a push notice when the rates have been adjusted.
In short a faster way of communication between the users of the app and the management of the island.