價格：免費
檔案大小：90.2 MB
版本需求：需要 iOS 9.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Fountain of Numbers, a game of mental calculation and memory.
Have fun training your mind through 75+ levels of fun.
Parents, have your kids improve their addition and subtraction skills without effort.
支援平台：iPhone, iPad