Basic Calculator (-/+)

*** Free and useful basic calculator for iPhone and iPad *** The calculator with a simple interface helps you calculate easy. This app shows all steps of the transaction, therefore, you cannot confused. If you any mistake, you can delete the last digit without the need for all delete all term. The app is always with you when you need basic functions of the calculator. This app is a free, simplest and best calculator in the app store. Why this calculator useful and best? - Simple user interface - Showing all steps of a transaction - Deleting the last digit without the need for all delete all term - Doing four basic mathematics functions - Mode operation - Percentage operation - Square root operation