Retro Calculator is an open-sourced, retro-styled pop-up calculator that allows users to perform basic arithmetic calculations. With its nostalgic design, this calculator brings back the charm of classic calculators from the past.

The calculator can be accessed via a pop-up window, making it convenient for quick calculations. Users can input numbers and perform calculations using either the keyboard or the on-screen buttons.

One of the notable features of Retro Calculator is its support for shortcuts. By pressing the 'c' key or the 'enter' key (or the 'return' key on Mac), users can quickly obtain the result of their calculations.

Whether you want to reminisce about the past or simply prefer the retro aesthetic, Retro Calculator provides a fun and functional way to perform basic arithmetic operations.