This app was mentioned in 2 comments, with an average of 2.00 upvotes
There is a version of this for Android as well for anyone wondering.
Edit: So there's actually a couple of different ones, but this seems to be the best one. https://play.google.com/store/apps/details?id=com.archteon.lovecraft&hl=en
I'd hyperlink it but new phone doesn't seem to have the option to format it properly.
Edit 2: fixed the link issue.
https://play.google.com/store/apps/details?id=com.archteon.lovecraft&hl=en
Note: His books are public domain.