Is there a plan to update the app to accommodate Frosthaven or make a separate one?

Being able to use the same app but purchase, "DLC" to unlock Frosthaven content would be sweet.

If there is plans to make / update the app, any idea if it will be available come release of the game?

I absolutely love this app and it has made playing Gloomhaven less of a chore and helped get it to the table more often.