ゼロから始めるフラッシュ暗算 そろばん未経験もOK

ゼロから始めるフラッシュ暗算 そろばん未経験もOK is an education app by TaK.dev with 1+ downloads (about 1 estimated). +1 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.

From the store listing: “Learn flash mental arithmetic, starting with the basics of the abacus, through self-study. Once you're comfortable with the beads on the screen, try it mentally. Simple and easy, it's a great brain training exercise for adults, starting with just a few minutes a day. Suitable for seniors as well.”