價格：免費
檔案大小：58.5 MB
版本需求：需要 iOS 8.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
OPALESCE is a tool for downloading and running shortchanged micro units for learning a variety of interesting topics. The tool was optimised for senior citizens so that they can easily use it.
OPALESCE is freely available and the micro units that can be downloaded are free as well.
支援平台：iPhone, iPad