【實用財經app】One Sum Tip Calculator|最夯免費app-綠色工廠好玩App

One Sum is a tip calculator app with a simple, beautiful, intuitive interface that will help you tip your server, bartender, hairdresser or dentist quickly and simply.

Just tap the text, enter the subtotal, tax and the percentage you want to tip and One Sum will take care of the rest. One Sum will also give you the total amount with tip for in case you want to tip on your credit card.