One of the harder to find replacements in moving from iOS to GrapheneOS has been a solid PDF viewer. It turns out that ImageToolbox nails it.

Available on nostr:npub10r8xl2njyepcw2zwv3a6dyufj4e4ajx86hz6v4ehu4gnpupxxp7stjt2p8.

https://github.com/T8RIN/ImageToolbox