Only for Linux. I use Okular on Linux. A non-glare, matt, 23" 4K UHD LG screen. Linux Mint with Mate on a Dell 7050 "lunchbox". Not portable!
I use Pocketbook on Android for PDFs and epubs (fixed and reflowable).
The Pixel tablet my friend had was too shiny. Reflections cause headaches as the eyes unconsciously refocus on the further off objects.
Summatra PDF seemed best for Windows Tablets.