#DailyUI 004 - Calculator

#Daily UI 004:
Design a calculator. Standard, scientific, or specialty calculator for something such as a mortgage? Is it for a phone, a tablet, a web app?

A calculator app to calculate tips, split bills, and more. I had never designed a calculator before, and this challenge made me see how challenging it is to make a calculator that has more than one function, is simple to use, and looks nice.