This App is a calculator.
A notable feature is the ability to set a function key. There are two kinds of function key. One can be represented by y = ax + b.
For example, when you went to tour the U.S., if you want a temperature conversion (Fahrenheit Convert Celsius) and it can be used.
Another is calculated using the unit. For example, if you are a pharmacist. Some drugs, are packaged 14 tablets per sheet. If you need 104 tablets, what should you pick look like? This App show you result easily and simpley.
(7 sheet and 6 tablets).