[Moonlit Sky]

For the past half-decade or so, I’ve used Marvin as my main reader app on my iPad. Its UI is generally solid, and it has good support for scrolled reading. But its shortcomings have been becoming clearer to me, lately. It can’t display vertical text correctly; moreover, it can’t read EPUB 3 nav-based tables of contents, in the absence of NCX fallbacks. Both of these have been sources of inconvenience for me over the last few months, and caused me to begin a search for an alternative reader.

Unfortunately, my search has gone poorly thus far. Yomu has good support for scrolling and vertical text, and in some technical sense even can handle EPUB 3 TOCs, but its TOC rendering is broken in the sense that it includes a blank TOC entry for every spine item which lacks an entry in the original, while simultaneously flattening any nested structures in the original. MapleRead CX handles tables of contents well, and supports vertical text, but its support for scrolling is very awkward, with long blank spaces inserted after images, no ability to advance via tap, and, in books with vertical text, inconsistent handling of scroll direction. All the other readers I’ve tried fall even flatter in one regard or another.

So, now, I turn to the collective knowledge of the MobileRead forums. Are there any readers which, unlike those I’ve managed to find and try out so far, support all three of those things well? (And, ideally, have dark mode support too, although I haven’t found that to be nearly as rare as my other criteria.)