Hirokuma.App Apps

This is an app that you can learn addition and subtraction using anabacus.

This is an app that get device camera information.

Have you ever found it difficult to operate the abacus with theabacus app?

This is the app that you can learn division using an abacus.

356+735+195, 23×89, 5626÷58, Can you solve each in 5 sec by mentalarithmetic?

This is the app that you can learn multiplication using an abacus.