[goosedragons]

You can also put KOReader on Android devices (or jail broken Kindles). Personally I'm not a fan though. It like every other open ePub reader I've tried also has limited to no support for ePub 3, so no vertical writing, no right to left page turns in manga, etc. I'd rather use Kobo's renderer than KOReader, better UI and better rendering IMO.

[mdaniel]

> It like every other open ePub reader I've tried also has limited to no support for ePub 3

Is there an open issue for that feature gap in KOReader? I'm always curious whether it's just "we haven't gotten there yet" versus "we don't want to do that"

[goosedragons]

Yeah there is for vertical writing (https://github.com/koreader/koreader/issues/4353) at least. It seems like it's a limitation of their engines so I don't blame them.