If you’re already using Bunpro for grammar, then I can say that the new Bunpro vocab feature(s) are genuinely excellent and worth your time trying out.
Bunpro vocab is currently still in its Beta stage, so you have to opt-in to the Beta program within your Account Settings.
Another feature that this unlocks is the Decks feature, which is a fundamental part of how Vocab is used, and also how Vocab and Grammar can be used together, particularly in the textbook specific decks which are available. E.g. The Genki I deck includes both the grammar and vocab from the book, and it’s presented in the same order as the book.
If you’ve already started with the Genki I grammar – via the older Paths feature – then you don’t have to re-study the grammar points you’ve already started on. The points themselves are independent of the Paths and Decks they are included in. Instead, you’ll just start learning the vocab from previous chapters.
Since Bunpro is so flexible, if there’s a vocab that you’ve already studied (say, on WaniKani), then you can just Mark as Mastered, and you won’t have to study it on Bunpro.
Once you’ve covered your textbook’s vocab, then I would recommend either a) studying the vocab from one or more other textbooks, or b) starting on the ‘official’ Bunpro vocab decks, which are based on the JLPT system, going from N5 (basic) to N1 (advanced).
Within these Bunpro JLPT decks, you should probably go into the Deck Settings and change the ordering, since the default ordering of Alphabetical is not very useful. E.g. I chose Anime ordering; you can choose Novels, Netflix, etc.
I’ve been plowing through these JLPT decks to fill in the big gaps I had in vocab, and I’m finding them very helpful.
Oh! I almost forgot one of the biggest benefits (IMHO), which is that you can use a Cloze-style input. In the deck/review settings it’s called “Fill-in / Manual”, or “Fill-in / Reveal & Grade”. What this does is to show you a natively-written Japanese sentence, with a blank in it where the vocab should go. You can optionally show hints to help you figure out which word is most likely intended, if there are several similar vocabs it could be.
Basically, this style of input is almost exactly the same as for when you’re doing Grammar Reviews in Bunpro. The main difference is that you don’t have to do any grammar-related conjugation or anything like that.
The benefit, IMHO, is that you not only learn the meanings of the vocabs, but you also learn how they are used in context, in actual Japanese sentences which are written by and curated by native Japanese speakers at Bunpro. This really helps with figuring out the different nuances between similar words.
Currently, this Cloze-style input is only available for N5 (complete), N4 (complete), and N3 (functionally complete, but missing some hints). Vocabs for N2 and N1 are still just ‘see Japanese, write English’, but they are actively working on these. N2 should be finished in a few months, they said.