CalculatorDU is a free calculator app designed for daily use on iPhone. It offers basic arithmetic operations including addition, subtraction, multiplication, division, and square root calculations. Users can save both input values and results for future reference, enabling quick and convenient access to previous calculations.

This utility also allows users to verify the calculation process, copy and paste numerical values, and customize operation symbols. With the ability to display up to 21 digits for calculations, CalculatorDU offers flexibility in numerical display format, allowing users to select decimal points, delimiters, and split digit groups. Additionally, users have the option to change the display language and use the app in both portrait and landscape modes for enhanced usability.