Wow, I reached level 5 last Saturday, but I’m still learning vocabulary from level 4! They never end hahaha. So I was wondering how many new kanjis/vocabularies do you guys learn per day?
I normally stick to the number 9. When I’m learning radicals I normally learn more than 9 per day, because they are quite easy since you don’t have to learn a reading, but when I get to the “meat” of the level, the kanji and vocabulary, I try to learn 9 a day… more than that I feel it’s too much. Besides that, if you learn a ton of new items, the reviews in the next few days are going to be HUGE! Sometimes I get lucky and already know some of the vocabularies, these words I don’t count. But it’s being quite slow… I’m taking almost 13-15 days per level this way. But I’m ok with that, I’m really not in a hurry and don’t have a lot of time to dedicate myself to japanese anyway.
I was an 8-dayer up until I hit this level, but at a certain pace WK winds up eating up at least 2 hours just to keep up with reviews and whatnot, and that’s about the amount of time I have to dedicate to studying Japanese. Wound up burning out and I’ve been on this level for 2 weeks now 
(I’ve been studying grammar instead). I’m mostly recovered though, and the plan moving forward is to allocate 1hr - 1hr 20 min to WK and the remaining 40min - 1hr to studying grammar (20 minute chunks of time) as opposed to going for a set number of lessons every day. If reviews are piling on fast enough that I can’t get them down to 0, I’ll reassign the time I usually reserve for lessons to reviews on the next day, so that way I naturally maintain an equilibrium that fits into my schedule.