New version of KunOn script: WK Custom Review Question (KunOn+)

Btw, an alternative to this script is Katakana madness,
which writes all Onyomi readings in Katakana.

That way, if you want to know which reading it asks for, you just type
a letter (a), and if it’s Katakana, it asks for Onyomi.
I found that always telling me Kunyomi or Onyomi is a bit of a distraction for me.
Also, this is good Katakana practice.