價格：免費
檔案大小：13.3 MB
版本需求：需要 iOS 8.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
This handy little app, which you won't even notice takes up any space at all on your phone can save you time and the mathematical embarrassment of having to ask your family or friends what 5% of $100 is or 10% of $120.
This app will even recommend you how much percentage your can tip on, based on the service you receive.
支援平台：iPhone