ハングル文法:韓国語 瞬間作文トレーニング is an education app by Cobalt Leaf with 100+ downloads (about 141 estimated). +9 installs in the last 7 days. Released Sep 7, 2026. Install growth, rank history, SDKs and ad networks.
From the store listing: “Translate Japanese to Korean the moment you see it. Master TOPIK grammar with 52 grammar chapters and 520 instant composition questions.”