價格：免費
檔案大小：23.5 MB
版本需求：需要 iOS 11.0 或以上版本。與 iPad 相容。
支援語言：英語
A 13 column Japanese abacus.
Tap a bead to move it. To move a whole stack up tap the lowest bead. To move a whole stack down tap the highest bead.
Note: This is a utility app, not an educational app. It does not teach the user how to use an abacus.
支援平台：iPad