This calculator app produces different sounds when you touch buttons. This makes it easier to recognize which button you are touching, and changes calculation into amusing experience. Also, the special functions to calculate taxes and discounts really help your shopping.
[Touch sounds] - Select sound (phone and acoustic guitar) - Assign each button a sound as you like - Turn on/off sounds
[Discount calculation] - Quick calculation by touching 12 buttons with discount percentages - Display both the final price and the amount of money saved - Input the final price into an expression and continue to calculate
[Tax calculation] - Calculate a tax with one click - Display the amount of a tax
[History] - Save an expression, the date and time each time you touch the '=' button or 'TAX' buttons. - Delete the history one by one - Delete the entire history - Input expressions from the history into the main screen and continue to calculate - Copy expressions to clipboard - Share expressions
[Settings] - Tax rate (the default value is 8%) - Way of rounding the amount of taxes - Way of rounding discounts - Do not save history - Keep screen on