I think a companion app for Stranded Deep would be a great idea.
Some features could be
*Access to these forums.
*Gallery for image sharing maybe including Photo of the week comps.
*Seed Sharing.
*Seed Viewer
In this players would enter their seed numbers and the app would show their cartographer and if you clicked on an island it would show you that islands resources.
*Multiplayer Support
If/When MP comes to console players could make a post asking for others to play with, would be a great way to make new friends.