I'm running Termux with XFCE desktop on Android. I only just realized that the only program I currently have installed that can properly open PDFs is GIMP, and that's extreme overkill as I just want a lightweight reader, no need to manipulate them as images ya know.

Also, related side question, are there any lightweight Linux terminal programs that can export PDF as plain text? I'm kinda hoping to pipe the text output of George Orwell 1984 through espeak reader and have Linux read it out to me...

Edit: Plain text and speech engine questions solved, and rather simple no less. This is the refined version BTW, --stdin is necessary to make espeak read the entire document.

pdftotext go-1984.pdf -|espeak --stdin