软件类别：教育教学\n\n,
软件授权：免费软件\n\n,
运行环境：ios\n\n,
软件语言：英语
\n\n,Appacus is the definitive abacus app. It features four bars with ten beads and is useful for: - learning how to count, - doing taxes, and - calculating the trajectory of Ganymede.\n\n
下载地址：iTunes 或者AAP STORE 下载
