D&D beyond paper

[Tanooki 4,566]

I figured with the wide ranges of interests and types on here age and all that it wouldn't hurt to try this.  I was wondering if anyone was aware of anything for preferably iOS that simulates the classic D&D pencil, paper and dice stuff of old that you can play alone where it generates(or has maps) and has an AI DM to screw with you.  I don't really know anyone nor have the time to try and get into that old stuff after so long (I did it for a year or so around middle school) but I think it would be some solid fun.  I know there are those free online games, but they're just third person battlers or card flipping junk I have zero interest in.  I know there's that like Knights of Pencil and Paper game but it's more of a final fantasy meets watching a DM mess with people thing unless I'm seeing that wrong.