價格：免費
檔案大小：9.6 MB
版本需求：需要 iOS 8.2 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
A simple game to increase your memory. Watchful displays a grid of squares, and plays them in order. Just match that order, and you'll be presented with the next, more complex, sequence.
支援平台：iPhone