14 points
JLPT N3 grammar points
くせに vs のにkuse ni · noni
a sneer vs a plain contrast
わけがない vs わけではない vs はずがないwake ga nai · hazu ga naithere's no way vs that's not to say
とおり(に) vs ままtoori ni · mamacopying a manner vs freezing a state
わりに vs にしてはwari ni · ni shite waweighing a degree vs weighing a label
につれて vs にしたがって vs とともにni tsurete · to tomo nithree ways to say "as X happens, Y follows"
せいで vs おかげで vs ためにsei de · okage de · tame niblame, credit, and a neutral cause
がち vs っぽい vs 気味gachi · ppoi · gimia tendency, a trait, and a touch of something
やすい vs にくい vs づらいyasui · nikui · zuraieasy and hard to do — and the one that needs a person suffering
〜っけkkethe particle for something you knew and cannot retrieve
間 vs 間に vs うちにaida · aida ni · uchi nithe whole stretch, a point inside it, or a window about to close
において vs にとって vs に対してni oite · ni totte · ni taishitethe setting, the viewpoint, and the target
尊敬語 vs 謙譲語 vs 丁寧語sonkeigo · kenjōgo · teineigoone question decides which keigo you need
はず vs べきhazu · bekitwo things English calls “should”
見える vs 見られるmieru · mirareruin view by itself, or a chance you got
One email on launch day
That's the whole list. rikAI is an iPhone app and it isn't out yet.