Good, but... Please add the ability to manually select the text when doing dictionary lookup. The app makes very bizarre selections in the way it decides what you want to look up. Refuses to acknowledge any word that doesn't begin with a kanji and won't pick up okurigana either, so you end up searching just by kanji and getting hundreds of results...
Big font size Larger font sizes that became available after last update are awesome. Thank you, 2SC1815J.
No landscape mode Looks good but please allow landscape mode! On a tablet it would be much more usable.
* Add "Screen Double Tap On Center" (Ignore/Show Menu/Go To Page) config.
* Adjust line gap on some device (Kobo Glo, Kobo Touch, etc.).
Conversion in an instant ordinary text for vertical writing, Twitter, it is easy to fall behind the app in line.