First of all, I havn't tried the game, and havn't red the rules. My first thought of the app was very good, because of the random tiles and puzzels, but when I watched some playthrougs the app seems to do EVERYTHING. For my point of view the app seems like an game, you can watch be played physically.
So the boardgame feels kinda redundant in a way.
How does the boardgame actually contribute, other than look very good?
The app doesn't keep track of your investigators (location/health/sanity/items), monsters (only health and which ones are still alive).
The board is where the game happens, the app is more like a reference for "what happens next?"