23 points
JLPT N4 grammar points
to come to do · to become able to
ことにする vs ことになるkoto ni suru · koto ni naruyour decision vs one that landed on you
ように vs ためにyō ni · tame niso that vs in order to
だけ vs ばかり vs しかdake · bakari · shikathree ways to say only
そうだ・らしい・ようだ・みたいthe four hedgeslooks like · apparently · it seems
と・ば・たら・ならto · ba · tara · narawhich “if” goes where
〜ておく vs 〜てしまうte oku · te shimauready for later vs done and dusted
〜たばかり vs 〜たところta bakari · ta tokorohow you feel about it vs where the clock is
ないで vs なくて vs ずにnaide · nakute · zu nithree negative て-forms, one of them a cause
から vs のでkara · nodeyour reasoning, or simply the situation
前に vs てから vs あとでmae ni · te kara · ato debefore, after, and the one that says the first act had to finish
たことがある vs ことがあるta koto ga aru · koto ga aruone た between an experience you have had and something that happens sometimes
思う vs 考えるomou · kangaeruholding a view, and doing the work of reaching one
がる vs たがるgaru · tagaruwhy 彼は寒い is blocked, and what to say instead
借りる vs 貸す vs 返すkariru · kasu · kaesuborrow, lend, give back — and the particle that changes with the direction
あげる vs くれる vs もらうageru · kureru · morauwhich way the favour is travelling
自動詞 vs 他動詞jidōshi · tadōshi開く vs 開ける, and who gets blamed
ている vs てあるte iru · te arua state, and a state somebody left
られる — 受身 vs 可能 vs 尊敬ukemi · kanō · sonkeione ending doing three unrelated jobs
てもいい vs なければならないte mo ii · nakereba naranaipermission and obligation as one grid
つもり vs 予定 vs ようと思うtsumori · yotei · yō to omouresolve, schedule, and deciding just now
の vs ことno · kotowhich nominaliser, and when it's forced
知る vs 分かるshiru · wakarutwo verbs English calls know
One email on launch day
That's the whole list. rikAI is an iPhone app and it isn't out yet.