If I'm picking an app purely by how gigantic its English collection feels, I usually split my thinking into two buckets: user-created fiction and public-domain/classic works. For original, contemporary stories that are free to read and often serialized by their authors, 'Wattpad' is the obvious heavyweight — it's stuffed with millions of stories across genres, from short YA romances to sprawling fantasy serials. I love the chaotic creativity there: you can find hidden gems, fanfiction, and experimental formats that you won't see in a traditional store. The trade-offs are obvious — quality varies wildly and you’ll see a lot of incomplete or rough drafts — but for sheer volume of free, English-language novels, it's absolutely one of the largest single places to go without paying a fee or needing a library card.
On the other hand, if you want the broadest catalog of English books that are legally free, 'Project
gutenberg' is my go-to for classics: it hosts over sixty thousand public-domain titles in many formats. The writing is mostly older works — think Dickens, Austen, and lots of obscure Victorian novels — but the coverage is huge and the texts are clean and download-friendly. For modern bestsellers or recent indie releases, that won't help, but for everything in the public domain it's unbeatable.
There's a third angle that's practical and often overlooked: library-based apps like 'Libby' (powered by OverDrive) and services like 'Hoopla' give you access to millions of
ebooks and audiobooks through your local library. I use this combo all the time — with a library card you get contemporary bestsellers, indie presses, and a massive rotating catalog that in total often outstrips single-platform offerings. The catch is you need a library membership and sometimes you wait on holds, but if you're okay with that,
the selection feels endless and it's all free.
So, depending on what “largest” means to you: for user-generated English novels, 'Wattpad' probably has the biggest loaf of original content; for public-domain breadth, 'Project Gutenberg' wins; and for the biggest practical, modern catalog accessible for free in-app,
library apps like 'Libby' (plus 'Hoopla') collectively offer the most. Personally, I bounce between all three — guilty pleasure
reads on wattpad, classics on Project Gutenberg, and new releases through Libby — and that mix keeps my
TBR pile delightfully out of control.