Gave evince (gnome document viewer) a try (1/2)
Purism gives a "fully optimized" rating on https://tracker.pureos.net/w/pureos/mobile_optimized_apps/ so … high hopes.
For work, I sometimes read these https://csrc.nist.gov/publications/sp800 so that’ll be my real-world test case.
I downloaded it from the gnome browser w/o trouble.
In portrait, it worked well. Rendered fine. Pinch-zoom fine. Full-screen fine. Responsive.
About as good as you can expect for reading a pdf on a phone.
I think context matters, so you should know I
* support the free software folks
* think you should fully control your devices
* do not consent to your surveillance
* cannot wait for a viable alternative to iOS/Android
* run GNU/Linux on all my machines
* am happy to support the creation of a GNU/Linux phone
* understand the Librem5 is a work-in-progress
* work in software development, though not anything mobile
Keep this in mind. My approach to technology may be different than yours.
I'll use this to toot a bit about linux phones, primarily the Librem5 from Purism. I hope to pass on some information that I'd be interested in if I was thinking about buying one.
I am not, in any way, affiliated with Purism beyond being a customer.
If you find any of this interesting or helpful, great. If not, well most of social media is moronic anyway, what did you expect? :)