From my experience, EPUB feels way more comfortable, especially on mobile. You can change font size, switch to dark mode, and it just adjusts to the screen nicely. PDFs, on the other hand, look exactly the same everywhere, which is good for formatting, but sometimes it’s annoying to zoom in/out on a phone.
For things like novels or long reading sessions, I usually go with EPUB. But for study material or documents where layout matters, PDF still makes more sense.
What about you guys? Do you stick with PDF or prefer EPUB for daily reading?