계산기 is a calculator app designed with minimal features and a simple interface for easy usability. It offers basic functionalities such as memory functions (mc, mr, m-, m+), sign change (±), and percentage calculation %).

The app allows for the display of up to 14 decimal places, and anything beyond that is represented in exponential form. It also keeps track of previous calculations, providing a history of the calculations performed. For example, if you multiply 2 by 5, it will display the result as "2 * 5 = 10."

When entering mathematical operations such as addition (+), subtraction (-), multiplication (×), or division (÷), pressing the backspace (←) button will delete only the last entered operation.

Please note that no developer contact information is provided.