8 points
JLPT N1 grammar points
ずにはいられない・てやまない・を禁じ得ないcan't help it
an urge, a lasting wish, and composure failing
だらけ vs まみれ vs ずくめdarake · mamire · zukumescattered, smeared, or nothing but
なり vs が早いか vs そばからnari · ga hayai ka · soba karathe tier above とたん — and one of them repeats
んばかり vs ばかりに vs とばかりにn bakari · bakari ni · to bakari nithree unrelated patterns, one spelling
すら vs さえ vs だにsura · sae · danithree “even”, split by register
がてら vs かたがた vs かたわらgatera · katagata · katawaraone trip, one visit, or one second career
なくして vs なしに vs ぬきでnakushite · nashi ni · nuki dea precondition, a skipped step, a removed ingredient
べからず vs まじき vs てはならないbekarazu · majiki · te wa naranaia sign, a judgement, and an ordinary rule
One email on launch day
That's the whole list. rikAI is an iPhone app and it isn't out yet.