Calculator with parentheses app analytics for September 11

Features: Basic calculations: addition, subtraction, multiplication and division. Percentage calculations (%). Calculations with parentheses, including nested parentheses. Shows the whole expression and intermediate results. History of recent calculations (25 entries). Shares history via email. Back and forward buttons to check and use recent calculations. Backspace button. Current expression is displayed above the result. Portrait and landscape modes. 7 color themes to customize background and button colors.