Basic Kanji Book (Bonjinsha) support
Sorry if this already posted, the name of the book is not exactly search-friendly; "kanji" returns half the support database.
The books being used by my school are https://www.bonjinsha.com/wp/bkb (and probably the Intermediate Kanji Book at a higher level) and it'd be great to have their order supported in this app.
Their app (https://www.bonjinsha.com/wp/bkb#BK02) appears to contain the full word list.