주산N암산 (기초2)

주산N암산 (기초2) is an education app by 한빛에듀 (주) with 1+ downloads (about 4 estimated). Install growth, rank history, SDKs and ad networks.

From the store listing: “through arithmetic and mental arithmetic It is a learning method that can enhance the mathematical calculation ability and excellent effect on brain development. It is a learning subject that can be easily learned by anyone of any age.”