價格：免費
更新日期：2018-09-02
檔案大小：5.9M
目前版本：1.1
版本需求：Android 4.0 以上版本
官方網站：mailto:cobu.dcf@gmail.com
Email：https://sites.google.com/view/cobuapps/privacy-policy
Encourage primary school kids to do their math!
Sin±Plin mimics doing 3-digit addition and subtraction operations on a chalkboard.
It highlights mistakes, it's easy to use and it's free for all.
MIT App Inventor, March 2018 Best Design Award!