I've played the board game Elder Sign. I have read some reviews and seen a gameplay video of Elder Sign: Omens, the iOS app based on the board game, but I haven't been able to find info on exactly how similar the two are. I see that they even share the same tag on here, so I'm guessing they are pretty close, but I'd like to know more definitively.
Is Elder Sign: Omen basically a straight-up single player version of the board game, or are there some mechanical differences between the two? If so, how do they differ?