I prefer reading digitally, and Kindle has the best functionality for that (I love looking up words and I like that I can mark quotes and have them show up in Goodreads. But for economic reasons I often borrow ebooks and AudioBooks through my library which uses Libby and Bookbites. Those apps aren’t as good. I also buy used books, often books I have already read, I usually get them for 1-3 usd. And I sometime spend some more to get a few of my all time favorites just in case armageddon :)